MESON Chess Problem Database

Problem Display
PID: 214921 (1R3Nb1/K4Pk1/5prp/7p/2P4B/8/8/Q4R2 w - - 0 1)

Wainwright, Joseph CJ

Baltimore American and Commercial Advertiser, 1880

(First published on Sun Dec 12 1880)

1R3Nb1/K4Pk1/5prp/7p/2P4B/8/8/Q4R2

#2

8 + 6

6490 yacpdb 2020
16968 Joseph Wainwright: 500+ Chess Problems (Meadley) 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qxf6#
    • 1...Rg2
      • 2.Qxf6#
    • 1...Rg3
      • 2.Qxf6#
    • 1...Rg4
      • 2.Qxf6#
    • 1...Rg5
      • 2.Qxf6#
  • Tries
    • 1.Sxg6?
      • threat
        • 2.fxg8Q#
      • 1...Kxg6
        • 2.fxg8Q#
      • 1...Kxf7
        • 2.Qxf6#
      • 1...Kh7
        • 2.fxg8Q#
      • 1...Bh7
        • 2.Qxf6#
      • 1...Bxf7!
    • 1.Bxf6+?
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Kxf7!
  • Keys
    • 1.Rxf6!
      • 1...Kh8
        • 2.Rxg6#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Bxf7
        • 2.Rxg6#
      • 1...Rg1
        • 2.Rf1#
      • 1...Rg2
        • 2.Rf2#
      • 1...Rg3
        • 2.Rf3#
      • 1...Rg4
        • 2.Rf4#
      • 1...Rg5
        • 2.Rf5#
      • 1...Bh7
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAB1(A),XP(b)
  • Tries
    • Try
      • S(H);XR(c)
      • Threat
        • PXB(f)=Q
      • Vars
        • K(e);N_SPINP(b),P-FLIGHT,XS(H)::PXB(f)=Q
        • K(e);P-FLIGHT,XP(F)::QAR1(A),XP(b)
        • K(e);N_SPINP(b),P-FLIGHT::PXB(f)=Q
        • B(f);SBLOCK::QAB1(A),XP(b)
      • Refutation
        • B(f);XP(F)
    • Try
      • B(D);CHECK,XP(b)
      • Vars
        • R(c);OGATE,P_SPINR(c),XB(D)::QAB1(A),XR(c)
      • Refutation
        • K(e);P-FLIGHT,XP(F)
  • Actual
    • R(B);XP(b)
    • Vars
      • K(e);S_FLIGHT::QAB(A)+R(B),XR(c)
      • R(c);OGATE,P_SPINR(c),XR(B)::QAB1(A),XR(c)
      • B(f);SBLOCK,XP(F)::QAB(A)+R(B),DCHECK,XR(c)
      • R(c);N_GUARD::QAB(A)+R(B)
      • B(f);SBLOCK::S(H)
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