MESON Chess Problem Database

Problem Display
PID: 560 (6Q1/4p3/4Pp2/5k1p/3P3p/3b4/6B1/2B3RK w - - 0 1)

Mansfield, Comins

1st HM., The Observer, 1964

6Q1/4p3/4Pp2/5k1p/3P3p/3b4/6B1/2B3RK

#2

7 + 6

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rf1#
    • 1...Bf1
      • 2.Rxf1#
    • 1...Bc2
      • 2.Rf1#
  • Tries
    • 1.Re1?
      • threat
        • 2.Bh3#
      • 1...Bf1
        • 2.Be4#
        • 2.Rxf1#
      • 1...Be4
        • 2.Bxe4#
      • 1...h3
        • 2.Bxh3#
      • 1...Be2!
    • 1.Qg5+?
      • 1...Kxe6
        • 2.Qd5#
      • 1...fxg5!
    • 1.Qg6+?
      • 1...Kxg6
        • 2.Be4#
      • 1...Kxe6!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Bh3#
      • 1...Kg4
        • 2.Qf3#
      • 1...Kxe6
        • 2.Qd5#
      • 1...Kg6
        • 2.Be4#
      • 1...Be2
        • 2.Qe4#
      • 1...Bf1
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#
      • 1...h3
        • 2.Bxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::R(B)
    • B(a);N_GUARD::R(B),XB(a)
  • Tries
    • Try
      • R(B);
      • Threat
        • B(D)
      • Vars
        • B(a);N_GUARD,P_PINB(D)::B(D),XB(a)
        • P(b);::B(D),XP(b)
      • Refutation
        • B(a);
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XP(F)::QAB1(G)
      • Refutation
        • P(e);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);S_FLIGHT,XQ(G)::R(B)+B(D),DCHECK
      • Refutation
        • K(c);P_SPINP(e),S_FLIGHT,XP(F)
  • Actual
    • Q(G);
    • Threat
      • B(D)
    • Vars
      • K(c);S_FLIGHT::QAB1(G)
      • K(c);S_FLIGHT,XP(F)::QAB1(G)
      • K(c);S_FLIGHT::R(B)+B(D),DCHECK
      • B(a);N_GUARD::QAB1(G)
      • B(a);N_GUARD,P_PINB(D)::QAB1(G),XB(a)
      • P(b);::B(D),XP(b)
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