MESON Chess Problem Database

Problem Display
PID: 56143 (2K1Bn2/1pBN1Q2/6r1/p7/k5bR/pR1P2pq/2n5/8 w - - 0 1)

Mansfield, Comins

Complete Mansfield/III, 1999

2K1Bn2/1pBN1Q2/6r1/p7/k5bR/pR1P2pq/2n5/8

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Sc5#
    • 1...Sa1
      • 2.Qc4#
    • 1...Se1
      • 2.Qc4#
    • 1...Sd4
      • 2.Qc4#
    • 1...Se6
      • 2.Sc5#
  • Tries
    • 1.Kb8?
      • threat
        • 2.Sc5#
        • 2.Sb6#
      • 1...Re6
        • 2.Sc5#
      • 1...Se6
        • 2.Sc5#
      • 1...Rb6
        • 2.Sc5#
        • 2.Sxb6#
      • 1...b5
        • 2.Sc5#
      • 1...b6
        • 2.Sc5#
        • 2.Sxb6#
      • 1...Sxd7+!
    • 1.Rxg4+?
      • 1...Rxg4
        • 2.Sc5#
        • 2.Sb6#
      • 1...Sb4
        • 2.Sc5#
        • 2.Sb6#
      • 1...Sd4
        • 2.Sc5#
        • 2.Sb6#
        • 2.Rxd4#
        • 2.Qc4#
      • 1...Qxg4!
    • 1.Qe6?
      • threat
        • 2.Sc5#
        • 2.Sb6#
      • 1...Rxe6
        • 2.Sc5#
      • 1...Sxe6
        • 2.Sc5#
      • 1...b6
        • 2.Sc5#
        • 2.Sxb6#
      • 1...Sxd7!
    • 1.Qf5?
      • threat
        • 2.Sc5#
        • 2.Qb5#
      • 1...Sxd7
        • 2.Qb5#
      • 1...Sb4
        • 2.Sc5#
      • 1...Rg5
        • 2.Sc5#
      • 1...Rb6
        • 2.Sc5#
      • 1...Sd4
        • 2.Sc5#
      • 1...b5
        • 2.Sc5#
        • 2.Qxb5#
      • 1...Kxb3!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Qb3#
      • 1...Kxb5
        • 2.Qc4#
      • 1...Re6
        • 2.Sc5#
      • 1...Sa1
        • 2.Qc4#
      • 1...Sb4
        • 2.Rxa5#
      • 1...Sd4
        • 2.Qc4#
      • 1...Se6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(h);N_PINS(E)::B(H)+S(E),DCHECK
    • S(a);N_GUARD::QAR2(F)
    • S(a);N_GUARD,N_SPINB(f)::QAR2(F)
    • S(j);N_PINS(E)::B(H)+S(E),DCHECK
  • Tries
    • Try
      • K(G);N_SPINS(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::B(H)+S(E),DCHECK
        • S(j);::B(H)+S(E),DCHECK
        • P(i);::S(E)
      • Refutation
        • S(j);CHECK,P_SPINS(j),XS(E)
    • Try
      • R(C);CHECK,N_SPINS(E),XB(f)
      • Refutation
        • Q(d);P_PINS(E),XR(C)
    • Try
      • Q(F);N_SPINS(E)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XQ(F)::B(H)+S(E),DCHECK
        • S(j);XQ(F)::B(H)+S(E),DCHECK
      • Refutation
        • S(j);P_SPINS(j),XS(E)
    • Try
      • Q(F);N_SPINS(E)
      • Threat
        • DUALS(2)
      • Vars
        • S(j);P_SPINS(j),XS(E)::QAB1(F)
        • S(a);N_SPINB(f)::B(H)+S(E),DCHECK
        • R(h);::B(H)+S(E),DCHECK
      • Refutation
        • K(e);N_SPINB(f),S_FLIGHT,XR(A)
  • Actual
    • R(A);
    • Threat
      • QAB1(F)
    • Vars
      • K(e);N_SPINB(f),S_FLIGHT,XR(A)::QAB1(F)
      • R(h);N_PINS(E)::S(E)
      • S(a);N_GUARD::QAR2(F)
      • S(a);N_SPINB(f),SBLOCK::R1(A),XP(g)
      • S(a);N_GUARD,N_SPINB(f)::QAR2(F)
      • S(j);N_PINS(E)::S(E)
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