MESON Chess Problem Database

Problem Display
PID: 275442 (1K2N1R1/8/1pP1N1n1/1r1Rpk1p/2Q1n3/2B5/4Bp1P/8 w - - 0 1)

Easter, Norris

Western Morning News, 1926

(First published on Sat Feb 27 1926)

1K2N1R1/8/1pP1N1n1/1r1Rpk1p/2Q1n3/2B5/4Bp1P/8

#2

10 + 8

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Rxe5#
    • 1...Sg5
      • 2.S6g7#
    • 1...Sf6
      • 2.S8g7#
    • 1...Sf4
      • 2.Sd4#
  • Tries
    • 1.S6g7+?
      • 1...Kf4
        • 2.Bd2#
      • 1...Kg5!
    • 1.Rf8+?
      • 1...Kxe6
        • 2.Rxe5#
      • 1...Sf6
        • 2.S8g7#
        • 2.Rxf6#
      • 1...Sxf8!
  • Keys
    • 1.Bf1!
      • threat
        • 2.Bh3#
      • 1...Kg4
        • 2.Qxe4#
      • 1...Kxe6
        • 2.Rxe5#
      • 1...Sg5
        • 2.S6g7#
      • 1...Sf6
        • 2.S8g7#
      • 1...Sf4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINP(d),S_FLIGHT,XS(G)::QAB(D)+R(E),DCHECK,XP(d)
    • S(b);SBLOCK::S(G)
    • S(b);SBLOCK::S(I)
    • S(h);SBLOCK::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT,P_SPINS(b)::B(C)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(J);CHECK
      • Vars
        • K(e);N_SPINP(d),S_FLIGHT,XS(G)::QAB(D)+R(E),DCHECK,XP(d)
      • Refutation
        • S(h);XR(J)
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • K(e);N_GUARD,N_SPINP(d),P_SPINS(b),S_FLIGHT::QAR2(D),XS(b)
      • K(e);N_GUARD,N_SPINP(d),S_FLIGHT,XS(G)::QAB(D)+R(E),DCHECK,XP(d)
      • S(b);SBLOCK::S(G)
      • S(b);SBLOCK::S(I)
      • S(h);SBLOCK::S(G)
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