MESON Chess Problem Database

Problem Display
PID: 195169 (n3krbR/1Kp1pNB1/2P1P1B1/b2NQ3/8/8/8/8 w - - 0 1)

Windsor, H

Pittsburgh Gazette-Times, 1918

n3krbR/1Kp1pNB1/2P1P1B1/b2NQ3/8/8/8/8

#2

9 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf7
      • 2.Rxg8#
    • 1...Bxf7
      • 2.Rxf8#
    • 1...Bh7
      • 2.Rxf8#
    • 1...Sb6
      • 2.Sxc7#
  • Tries
    • 1.Kxa8?
      • 1...Rxf7
        • 2.Rxg8#
      • 1...Bxf7
        • 2.Rxf8#
      • 1...Be1
        • 2.Sxc7#
      • 1...Bd2
        • 2.Sxc7#
      • 1...Bc3
        • 2.Sxc7#
      • 1...Bb4
        • 2.Sxc7#
      • 1...Bh7
        • 2.Rxf8#
      • 1...Bb6!
    • 1.Kc8?
      • threat
        • 2.Sd6#
      • 1...Rxf7
        • 2.Bxf7#
        • 2.Rxg8#
        • 2.exf7#
      • 1...Bxf7
        • 2.Bxf7#
        • 2.Rxf8#
        • 2.exf7#
      • 1...Sb6+!
    • 1.Sg5+?
      • 1...Rf7
        • 2.Rxg8#
      • 1...Bf7
        • 2.Rxf8#
      • 1...Kd8!
    • 1.Sh6+?
      • 1...Rf7
        • 2.Rxg8#
      • 1...Bf7
        • 2.Rxf8#
      • 1...Kd8!
    • 1.Sd8+?
      • 1...Rf7
        • 2.Rxg8#
      • 1...Bf7
        • 2.Rxf8#
      • 1...Kxd8!
  • Keys
    • 1.Qa1!
      • 1...Rxf7
        • 2.Rxg8#
      • 1...Bxf7
        • 2.Rxf8#
      • 1...Be1
        • 2.Qxa8#
      • 1...Bd2
        • 2.Qxa8#
      • 1...Bc3
        • 2.Qxa8#
      • 1...Bb4
        • 2.Qxa8#
      • 1...Bb6
        • 2.Qxa8#
      • 1...Bh7
        • 2.Rxf8#
      • 1...Sb6
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATEB,P_SPINB(g),P_SPINR(f),XS(G)::R(I),XB(g)
    • B(g);OGATE,P_SPINB(g),P_SPINR(f),XS(G)::R1(I),XR(f)
    • B(g);OGATE,P_SPINR(f)::R1(I),XR(f)
    • S(d);N_GUARD,S_CUTB(a)::S(A),XP(b)
  • Tries
    • Try
      • K(F);S_FLIGHT,XS(d)
      • Vars
        • R(f);OGATEB,P_SPINB(g),P_SPINR(f),XS(G)::R(I),XB(g)
        • B(g);OGATE,P_SPINB(g),P_SPINR(f),XS(G)::R1(I),XR(f)
        • B(a);N_GUARD::S(A),XP(b)
        • B(g);OGATE,P_SPINR(f)::R1(I),XR(f)
      • Refutation
        • B(a);
    • Try
      • K(F);S_FLIGHT
      • Threat
        • B(E)+S(G),DCHECK
      • Refutation
        • S(d);CHECK
    • Try
      • S(G);CHECK
      • Vars
        • R(f);P_SPINB(g),P_SPINR(f)::R(I),XB(g)
        • B(g);OGATE,P_SPINB(g),P_SPINR(f)::R1(I),XR(f)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • R(f);P_SPINB(g),P_SPINR(f)::R(I),XB(g)
        • B(g);OGATE,P_SPINB(g),P_SPINR(f)::R1(I),XR(f)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • R(f);P_SPINB(g),P_SPINR(f)::R(I),XB(g)
        • B(g);OGATE,P_SPINB(g),P_SPINR(f)::R1(I),XR(f)
      • Refutation
        • K(e);P-FLIGHT,XS(G)
  • Actual
    • Q(B);
    • Vars
      • R(f);OGATEB,P_SPINB(g),P_SPINR(f),XS(G)::R(I),XB(g)
      • B(g);OGATE,P_SPINB(g),P_SPINR(f),XS(G)::R1(I),XR(f)
      • B(a);OGATE::QAR(B),XS(d)
      • B(g);OGATE,P_SPINR(f)::R1(I),XR(f)
      • S(d);N_GUARD,S_CUTB(a)::S(A),XP(b)
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