MESON Chess Problem Database

Problem Display
PID: 48582 (R7/1KPQNp2/P4P2/k7/r1qp4/P1P5/3N1B2/R2B4 w - - 0 1)

Wainwright, Joseph CJ

1st Prize, Detroit Free Press, 1880

R7/1KPQNp2/P4P2/k7/r1qp4/P1P5/3N1B2/R2B4

#2

13 + 5

15 British Chess Magazine 1881
5689 The Chess Monthly (Hoffer) 1881
16968 Joseph Wainwright: 500+ Chess Problems (Meadley) 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sb3#
      • 2.Qxa4#
    • 1...Qa2
      • 2.Qxa4#
    • 1...Qe2
      • 2.Sb3#
      • 2.Qxa4#
    • 1...Qb3+
      • 2.Sxb3#
    • 1...Qd3
      • 2.Sb3#
      • 2.Qxa4#
    • 1...Qd5+
      • 2.Qxd5#
    • 1...Qxa6+
      • 2.Rxa6#
    • 1...Qe6
      • 2.Qxa4#
    • 1...Qxc3
      • 2.Qxa4#
    • 1...Qb4+
      • 2.axb4#
    • 1...Qc5
      • 2.Sb3#
      • 2.Qxa4#
    • 1...Rxa3
      • 2.Sxc4#
    • 1...Rb4+
      • 2.axb4#
    • 1...dxc3
      • 2.Bb6#
    • 1...d3
      • 2.Bb6#
  • Tries
    • 1.Qf5+?
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qb5+!
  • Keys
    • 1.Be2!
      • 1...Qb3+
        • 2.Sxb3#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qxa6+
        • 2.Rxa6#
      • 1...Qb4+
        • 2.axb4#
      • 1...Qc6+
        • 2.Sxc6#
      • 1...Qxc7+
        • 2.Qxc7#
      • 1...Rb4+
        • 2.axb4#
      • 1...Qxe2
        • 2.Sb3#
      • 1...Qxc3
        • 2.Qb5#
      • 1...Rxa3
        • 2.Sxc4#
      • 1...dxc3
        • 2.Bb6#
      • 1...Qa2
        • 2.Sc6#
        • 2.Qb5#
      • 1...Qd3
        • 2.Sb3#
      • 1...Qe6
        • 2.Qb5#
      • 1...Qc5
        • 2.Sb3#
      • 1...d3
        • 2.Bb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::QAR1(K),XR(a)
    • Q(b);CHECK,N_GUARD::S(C),XQ(b)
    • Q(b);CHECK,N_GUARD::QAR(K),XQ(b)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(G)::R1(M),XQ(b)
    • Q(b);N_GUARD,XP(F)::QAR1(K),XR(a)
    • Q(b);CHECK,OGATE::P(E),XQ(b)
    • R(a);N_GUARD,P_SPINR(a),XP(E)::S(C),XQ(b)
    • R(a);CHECK,OGATE::R(A)+P(E)DCHECK,XR(a)
    • P(c);OGATE,XP(F)::B(D)
    • P(c);OGATE::B(D)
  • Tries
    • Try
      • Q(K);CHECK
      • Vars
        • Q(b);CHECK,N_GUARD,P_SPINQ(b)::QAR(K),XQ(b)
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(K),XQ(b)
      • Refutation
        • Q(b);CHECK,P_SPINQ(b)
  • Actual
    • B(B);
    • Vars
      • Q(b);CHECK,N_GUARD::S(C),XQ(b)
      • Q(b);CHECK,N_GUARD::QAR1(K),XQ(b)
      • Q(b);CHECK,N_GUARD::QAR(K),XQ(b)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(G)::R1(M),XQ(b)
      • Q(b);CHECK,OGATE::P(E),XQ(b)
      • Q(b);CHECK,N_GUARD::S(L),XQ(b)
      • Q(b);CHECK,OGATE,XP(J)::QAB(K),XQ(b)
      • R(a);CHECK,OGATE::R(A)+P(E)DCHECK,XR(a)
      • Q(b);N_GUARD,XB(B)::S(C)
      • Q(b);N_GUARD,XP(F)::QAR1(K)
      • R(a);N_GUARD,P_SPINR(a),XP(E)::S(C),XQ(b)
      • P(c);OGATE,XP(F)::B(D)
      • Q(b);N_GUARD::S(C)
      • Q(b);N_GUARD::QAR1(K)
      • P(c);OGATE::B(D)
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