MESON Chess Problem Database

Problem Display
PID: 6417 (Q6K/2b5/nPPpR2p/3k4/2pNbp2/B4qn1/2N5/3R3B w - - 0 1)

Mansfield, Comins

2nd Place, La Nau, 1929

Q6K/2b5/nPPpR2p/3k4/2pNbp2/B4qn1/2N5/3R3B

#2

10 + 10

3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb6
      • 2.c7#
    • 1...Bb8
      • 2.c7#
    • 1...Bd8
      • 2.c7#
    • 1...Sb4
      • 2.Qa5#
    • 1...Sc5
      • 2.Sb4#
    • 1...Sb8
      • 2.Qa5#
  • Tries
    • 1.Sb4+?
      • 1...Sxb4
        • 2.Qa5#
      • 1...Kc5!
    • 1.Se2+?
      • 1...Qd3
        • 2.Sxf4#
      • 1...Bd3
        • 2.Sxf4#
      • 1...Kxe6!
    • 1.Re5+?
      • 1...dxe5
        • 2.Qg8#
      • 1...Kxe5!
    • 1.Rxd6+?
      • 1...Ke5
        • 2.Qe8#
      • 1...Bxd6!
  • Keys
    • 1.Re7!
      • threat
        • 2.Qg8#
      • 1...Qxa3
        • 2.Sb3#
      • 1...Sb4
        • 2.Qa5#
      • 1...Qg4
        • 2.Se2#
      • 1...Qh5
        • 2.Se2#
      • 1...Bf5
        • 2.Sxf5#
      • 1...Bg6
        • 2.Sf5#
      • 1...Bh7
        • 2.Sf5#
      • 1...Bb8
        • 2.c7#
      • 1...Bd8
        • 2.c7#
      • 1...Sc5
        • 2.Sb4#
      • 1...Sb8
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(j);OGATE,XP(F)::QAB(I)+P(G)
    • B(j);OGATE::QAB(I)+P(G)
    • S(g);OGATE::QAR(I)
    • S(g);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(g);OGATE,XS(C)::QAR(I)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • Q(a);P_SPINB(d),P_SPINQ(a)::S(E),XP(e)
        • B(d);P_SPINB(d),P_SPINQ(a)::S(E),XP(e)
      • Refutation
        • K(f);S_FLIGHT,XR(H)
    • Try
      • R(H);CHECK
      • Vars
        • P(h);SBLOCK,XR(H)::QAB(I)
      • Refutation
        • K(f);P-FLIGHT,XR(H)
    • Try
      • R(H);CHECK,XP(h)
      • Vars
        • K(f);P-FLIGHT::QAR(I)
      • Refutation
        • B(j);XR(H)
  • Actual
    • R(H);
    • Threat
      • QAB(I)
    • Vars
      • Q(a);N_GUARD,P_SPINB(d),XB(D)::R(A)+S(E)
      • S(g);OGATE::QAR(I)
      • Q(a);N_GUARD,P_SPINB(d)::R(A)+S(E)
      • B(d);N_GUARD,P_SPINQ(a)::R(A)+S(E),XB(d)
      • B(d);N_GUARD,P_SPINQ(a)::R(A)+S(E)
      • B(j);OGATE::QAB(I)+P(G)
      • S(g);N_GUARD,SBLOCK::S(C)
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