MESON Chess Problem Database

Problem Display
PID: 42290 (2b1N3/1pPkp1n1/1p1p3R/1K3R1B/4NP2/7Q/8/8 w - - 0 1)

Mansfield, Comins

Sunday Times, 1968

2b1N3/1pPkp1n1/1p1p3R/1K3R1B/4NP2/7Q/8/8

#2

9 + 7

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Rxd5#
  • Tries
    • 1.Sc5+?
      • 1...dxc5
        • 2.Rd5#
        • 2.Qd3#
      • 1...bxc5!
    • 1.S4f6+?
      • 1...Ke6
        • 2.Sxg7#
        • 2.Re5#
      • 1...exf6!
    • 1.Rg5+?
      • 1...Se6
        • 2.Qxe6#
      • 1...e6
        • 2.Rxg7#
      • 1...Sf5!
    • 1.Rf7+?
      • 1...Kxe8
        • 2.Rh8#
        • 2.Qxc8#
      • 1...Se6
        • 2.S4f6#
      • 1...Sf5!
  • Keys
    • 1.Rh7!
      • 1...Ke6
        • 2.Re5#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Sxh5
        • 2.Rf8#
      • 1...Sxe8
        • 2.Rc5#
      • 1...e5
        • 2.Rxe5#
      • 1...Se6
        • 2.S4f6#
      • 1...d5
        • 2.Rxd5#
      • 1...e6
        • 2.Rxg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(b);::QAB(A)+R(E),DCHECK,XP(b)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • P(a);XS(B)
    • Try
      • S(B);CHECK
      • Refutation
        • P(e);XS(B)
    • Try
      • R(E);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(A),XS(f)
        • P(e);P_SPINP(e)::R(E),XS(f)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • R(E);CHECK,P_PINP(e)
      • Vars
        • S(f);P_SPINS(f)::S(B)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • R(G);
    • Vars
      • K(d);S_FLIGHT::QAB(A)+R(E),DCHECK
      • S(f);OGATE,P_SPINP(e),P_SPINS(f),XR(E)::QAB(A),XS(f)
      • S(f);N_GUARD,P_SPINP(e),XB(F)::QAB(A)+R(E)
      • S(f);N_GUARD,P_SPINP(e),XS(I)::QAB(A)+R(E)
      • P(e);N_GUARD,P_SPINS(f)::QAB(A)+R(E),XP(e)
      • S(f);P_SPINP(e),SBLOCK::S(B)
      • P(b);::QAB(A)+R(E),DCHECK,XP(b)
      • P(e);OGATEB,P_SPINS(f),SBLOCK::R(G),XS(f)
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