MESON Chess Problem Database

Problem Display
PID: 18987 (2K4B/8/2pP1Q2/4RP2/2Pkqp1N/3B4/1P6/3R4 w - - 0 1)

Heathcote, Godfrey

Chess Amateur (The), 1911

2K4B/8/2pP1Q2/4RP2/2Pkqp1N/3B4/1P6/3R4

#2

11 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Bf1#
    • 1...Qg2
      • 2.Be2#
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qxf5+
      • 2.Sxf5#
    • 1...Qe1
      • 2.Sf3#
    • 1...Qe2
      • 2.Bxe2#
    • 1...Qe3
      • 2.Rd5#
    • 1...Qxe5
      • 2.Qxe5#
    • 1...c5
      • 2.Rxe4#
  • Tries
    • 1.Sg2?
      • threat
        • 2.Rd5#
      • 1...Qxf5+
        • 2.Rxf5#
      • 1...Qxg2
        • 2.Be2#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qxd3!
    • 1.Ra5+?
      • 1...Qe5
        • 2.Qxe5#
      • 1...Ke3!
    • 1.Rb5+?
      • 1...Qe5
        • 2.Qxe5#
      • 1...Ke3!
    • 1.Re6+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Kc5!
    • 1.Re7+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Kc5!
    • 1.Re8+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Kc5!
  • Keys
    • 1.Qg5!
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Ke3
        • 2.Qg1#
      • 1...Qxd3
        • 2.Qxf4#
      • 1...Qxe5
        • 2.Qg1#
      • 1...Qh1
        • 2.Bf1#
      • 1...Qg2
        • 2.Be2#
      • 1...Qf3
        • 2.Sxf3#
      • 1...Qd5
        • 2.Qg1#
      • 1...Qe1
        • 2.Sf3#
      • 1...Qe2
        • 2.Bxe2#
      • 1...Qe3
        • 2.Rd5#
      • 1...f3
        • 2.Rd5#
      • 1...c5
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::R(A)+B(C)
    • Q(b);N_GUARD::S(E),XQ(b)
    • Q(b);CHECK,XP(G)::S(E),XQ(b)
    • Q(b);N_GUARD::S(E)
    • Q(b);N_GUARD::R(A)+B(C),XQ(b)
    • Q(b);SBLOCK::QAB(I)+R(F),DCHECK
    • Q(b);OGATE,P_SPINQ(b),XR(F)::QAB1(I),XQ(b)
    • P(d);SBLOCK::QAB(I)+R(F),DCHECK,XQ(b)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB(I)+R(F),DCHECK
      • Vars
        • Q(b);CHECK,OGATE,XP(G)::QAB(I)+R(F),XQ(b)
        • Q(b);N_GUARD,XS(E)::R(A)+B(C)
        • Q(b);OGATE,P_SPINQ(b),XR(F)::QAB1(I),XQ(b)
        • Q(b);::QAB(I)+R(F),DCHECK,XQ(b)
      • Refutation
        • Q(b);P_SPINQ(b),XB(C)
    • Try
      • R(F);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(I),XQ(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(I),XQ(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P_SPINQ(b),S_FLIGHT::QAB1(I)
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(I),XQ(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P_SPINQ(b),S_FLIGHT::QAB1(I)
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(I),XQ(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P_SPINQ(b),S_FLIGHT::QAB1(I)
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(I),XQ(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(I);
    • Vars
      • Q(b);CHECK,XP(G)::S(E),XQ(b)
      • K(a);P_SPINP(c),P_SPINQ(b),S_FLIGHT::QAB(I)
      • Q(b);OGATEB,P_SPINQ(b),XB(C)::QAR2(I),XP(c)
      • Q(b);N_GUARD,P_SPINQ(b),XR(F)::QAB(I)
      • Q(b);N_GUARD::R(A)+B(C)
      • Q(b);N_GUARD::S(E),XQ(b)
      • Q(b);N_GUARD::QAB(I)
      • Q(b);N_GUARD::S(E)
      • Q(b);N_GUARD::R(A)+B(C),XQ(b)
      • Q(b);SBLOCK::B(K)+R(F),DCHECK
      • P(c);::B(K)+R(F),DCHECK
      • P(d);SBLOCK::B(K)+R(F),DCHECK,XQ(b)
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