MESON Chess Problem Database

Problem Display
PID: 42383 (6K1/3pp2p/1n6/2PPk1B1/1p1R3N/4p3/6B1/Q3q3 w - - 0 1)

Mansfield, Comins

Europe Echecs, 1968

6K1/3pp2p/1n6/2PPk1B1/1p1R3N/4p3/6B1/Q3q3

#2

8 + 8

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Rxd2#
    • 1...Qf2
      • 2.Rd2#
    • 1...Qg3
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rxb4#
      • 2.Rc4#
      • 2.Rf4#
      • 2.Rg4#
    • 1...Qxh4
      • 2.Rf4#
    • 1...Qd1
      • 2.Rxd1#
    • 1...Qf1
      • 2.Rd1#
    • 1...Qg1
      • 2.Rd1#
    • 1...Qh1
      • 2.Rd1#
    • 1...Qe2
      • 2.Rd2#
    • 1...Sxd5
      • 2.Re4#
  • Tries
    • 1.Rxb4+?
      • 1...Qc3
        • 2.Qxc3#
      • 1...Qxa1!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Bg7#
      • 1...Qg3+
        • 2.Rg4#
      • 1...Kf6
        • 2.Rf4#
      • 1...Qxh4
        • 2.Rf4#
      • 1...Sxd5
        • 2.Re4#
      • 1...Qf2
        • 2.Rd2#
      • 1...Qf1
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAB(A)+R(C),XQ(a)
    • Q(a);N_GUARD::QAB(A)+R(C)
    • Q(a);N_GUARD,XS(D)::QAB(A)+R(C)
    • S(e);SBLOCK,XP(F)::QAB(A)+R(C),DCHECK
  • Tries
    • Try
      • R(C);CHECK,XP(c)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB(A),XQ(a)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • Q(a);CHECK,N_GUARD::QAB(A)+R(C)
      • K(d);S_FLIGHT::QAB(A)+R(C),DCHECK
      • Q(a);N_GUARD,XS(D)::QAB(A)+R(C)
      • S(e);SBLOCK,XP(F)::QAB(A)+R(C),DCHECK
      • Q(a);N_GUARD::QAB(A)+R(C)
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