MESON Chess Problem Database

Problem Display
PID: 223196 (1Q1n4/1p2b3/3p1pn1/p2kP3/3N4/2RNK3/2P5/8 w - - 0 1)

Wainwright, Joseph CJ

Nashville Daily American, 1886

1Q1n4/1p2b3/3p1pn1/p2kP3/3N4/2RNK3/2P5/8

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe5
      • 2.Sf4#
    • 1...Sc6
      • 2.Qg8#
    • 1...Se6
      • 2.Qxb7#
    • 1...Sf7
      • 2.Qxb7#
    • 1...b5
      • 2.Qxb5#
  • Tries
    • 1.Sb4+?
      • 1...Kxe5
        • 2.Rc5#
      • 1...axb4!
    • 1.Sf4+?
      • 1...Kxe5
        • 2.Rc5#
      • 1...Sxf4!
    • 1.Rc7?
      • threat
        • 2.c4#
      • 1...Sxe5
        • 2.Sf4#
      • 1...Sc6
        • 2.Qg8#
      • 1...b5
        • 2.Qxb5#
      • 1...dxe5!
    • 1.Rc8?
      • threat
        • 2.c4#
      • 1...Sxe5
        • 2.Sf4#
      • 1...b5
        • 2.Qxb5#
      • 1...Sc6!
    • 1.Qxb7+?
      • 1...Sc6
        • 2.Qxc6#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Sxb7!
    • 1.Qxd8?
      • threat
        • 2.Rc5#
        • 2.Qg8#
      • 1...Sxe5
        • 2.Sf4#
        • 2.Rc5#
      • 1...Bf8
        • 2.Rc5#
      • 1...Sf4
        • 2.Rc5#
      • 1...Sf8
        • 2.Rc5#
      • 1...Sh8
        • 2.Rc5#
      • 1...b6
        • 2.Qa8#
        • 2.Qg8#
      • 1...Bxd8!
  • Keys
    • 1.Rc6!
      • threat
        • 2.c4#
      • 1...Sxe5
        • 2.Sf4#
      • 1...Sxc6
        • 2.Qg8#
      • 1...bxc6
        • 2.Qb3#
      • 1...b5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(e);N_GUARD,SBLOCK,XP(F)::S(C)
    • S(h);OGATE::QAB(G)
    • S(h);N_GUARD::QAB(G),XP(f)
    • P(f);OGATE::QAR2(G),XP(f)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XP(F)::R(B)
      • Refutation
        • P(a);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XP(F)::R(B)
      • Refutation
        • S(e);XS(C)
    • Try
      • R(B);
      • Threat
        • P(A)
      • Vars
        • S(e);N_GUARD,SBLOCK,XP(F)::S(C)
        • S(h);OGATE::QAB(G)
        • P(f);OGATE::QAR2(G),XP(f)
      • Refutation
        • P(c);XP(F)
    • Try
      • R(B);
      • Threat
        • P(A)
      • Vars
        • S(e);N_GUARD,SBLOCK,XP(F)::S(C)
        • P(f);OGATE::QAR2(G),XP(f)
      • Refutation
        • S(h);
    • Try
      • Q(G);CHECK,XP(f)
      • Refutation
        • S(h);XQ(G)
    • Try
      • Q(G);P_PINP(c),XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::R1(B)
        • S(e);::R1(B)
      • Refutation
        • B(g);N_SPINP(c),XQ(G)
  • Actual
    • R(B);
    • Threat
      • P(A)
    • Vars
      • S(e);N_GUARD,SBLOCK,XP(F)::S(C)
      • S(h);OGATE,XR(B)::QAB(G)
      • P(f);OGATE,XR(B)::QAB(G)
      • P(f);OGATE::QAR2(G),XP(f)
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