MESON Chess Problem Database

Problem Display
PID: 270186 (1NQ4K/4B3/1p6/3k2P1/PnRr2N1/1p3p2/2pp4/3b4 w - - 0 1)

Fellows, Arthur G

Sunday Referee, 1931

(First published on Sun May 3 1931)

1NQ4K/4B3/1p6/3k2P1/PnRr2N1/1p3p2/2pp4/3b4

#2

8 + 9

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Qg8#
    • 1...Sa2
      • 2.Qc6#
    • 1...Sd3
      • 2.Qc6#
    • 1...Sa6
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
  • Tries
    • 1.Se3+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Ke4!
    • 1.Rc5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...bxc5!
    • 1.Qd7+?
      • 1...Ke4
        • 2.Rxd4#
      • 1...Kxc4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Rxd4#
      • 1...Kxc4
        • 2.Sxb4#
      • 1...Ke4
        • 2.Rxd4#
      • 1...Rxc4
        • 2.Sf6#
      • 1...Rxg4
        • 2.Qg8#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Rd3
        • 2.Sxb4#
        • 2.Qg8#
      • 1...Re4
        • 2.Sxb4#
      • 1...Rf4
        • 2.Se3#
        • 2.Sxb4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(g);::QAB(G)
    • S(f);N_GUARD::QAB1(G)
    • S(f);N_GUARD::QAB1(G),XS(f)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(h);P-FLIGHT::QAR1(G)
      • Refutation
        • K(h);P_SPINR(g),S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(h);S_FLIGHT::QAB1(G)
      • Refutation
        • P(i);XR(B)
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);P_SPINR(g),S_FLIGHT::R1(B),XR(g)
      • Refutation
        • K(h);S_FLIGHT,XR(B)
  • Actual
    • S(F);
    • Threat
      • R1(B),XR(g)
    • Vars
      • K(h);N_GUARD,S_FLIGHT,XR(B)::QAR(G)+S(F),XS(f)
      • K(h);P_SPINR(g),S_FLIGHT::R1(B),XR(g)
      • R(g);SBLOCK,XR(B)::S(C)
      • R(g);XS(C)::QAB(G)
      • S(f);OGATE,XS(F)::QAB1(G),XS(f)
      • R(g);::S(F),XS(f)
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