MESON Chess Problem Database

Problem Display
PID: 55214 (5b1q/5R1p/2BB4/3prNp1/2QR3P/4Pk1P/5pr1/K2N3n w - - 0 1)

Mansfield, Comins

3rd HM., KeyStip 05. Ty., 1972

5b1q/5R1p/2BB4/3prNp1/2QR3P/4Pk1P/5pr1/K2N3n

#2

11 + 10

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Sg7#
    • 1...Rxf5
      • 2.Bxd5#
      • 2.Rxf5#
    • 1...Re8
      • 2.Sg7#
    • 1...gxh4
      • 2.Rf4#
    • 1...g4
      • 2.Rf4#
  • Tries
    • 1.Sg7+?
      • 1...Rf5
        • 2.Bxd5#
        • 2.Rxf5#
      • 1...Kg3!
    • 1.Bxd5+?
      • 1...Re4
        • 2.Sg7#
        • 2.Bxe4#
      • 1...Rxd5!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Rxe5#
      • 1...Rxe3+
        • 2.Sg7#
      • 1...Re4+
        • 2.Sd4#
      • 1...Rxd5+
        • 2.Sg7#
      • 1...Rxf5+
        • 2.Rd4#
      • 1...Re6+
        • 2.Re5#
      • 1...Re7+
        • 2.Re5#
      • 1...Re8+
        • 2.Sg7#
        • 2.Re5#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Sg3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD,P_PINR(F),XP(C)::R(K)+S(H)
    • R(f);N_GUARD,P_PINR(F)::R(K)+S(H)
    • P(g);N_GUARD,XP(G)::R1(F)
    • P(g);N_GUARD::R1(F)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • K(d);N_SPINP(e),P-FLIGHT,P_SPINR(f)
    • Try
      • B(I);CHECK,XP(e)
      • Refutation
        • R(f);P_PINR(F),XB(I)
  • Actual
    • R(F);XP(e)
    • Threat
      • B(I)+R(F),XR(f)
    • Vars
      • R(f);CHECK,N_GUARD,XP(C)::R(K)+S(H)
      • R(f);CHECK,SBLOCK::R(K)+S(H),DCHECK
      • R(f);CHECK,N_GUARD,P_SPINR(f),XR(F)::R(K)+S(H)
      • R(f);CHECK,N_GUARD,P_SPINR(f),XS(H)::B(I)+R(F)
      • R(f);CHECK::B(I)+R(F)
      • R(c);N_GUARD::QAB1(E),XR(c)
      • S(a);S_CUTR(c)::QAB1(E)
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