MESON Chess Problem Database

Problem Display
PID: 55619 (7K/B7/8/r2P1pP1/2Qpk3/4PN2/1bP2p2/7B w - - 0 1)

Mansfield, Comins

Neue Zurcher Zeitung, 1976

7K/B7/8/r2P1pP1/2Qpk3/4PN2/1bP2p2/7B

#2

9 + 6

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qd3#
    • 1...Bc1
      • 2.Qxd4#
    • 1...Ba3
      • 2.Qxd4#
  • Tries
    • 1.Se1+?
      • 1...Ke5
        • 2.Bb8#
        • 2.Qc7#
      • 1...Kxe3!
    • 1.Sg1+?
      • 1...Ke5
        • 2.Bb8#
        • 2.Qc7#
      • 1...Kxe3!
    • 1.Sd2+?
      • 1...Ke5
        • 2.Bb8#
        • 2.Qc7#
      • 1...Kxe3!
    • 1.Sh2+?
      • 1...Ke5
        • 2.Bb8#
        • 2.Qc7#
      • 1...Kxe3!
    • 1.Sxd4+?
      • 1...Ke5
        • 2.Bb8#
        • 2.Qc7#
      • 1...Kxe3!
    • 1.Sh4+?
      • 1...Ke5
        • 2.Bb8#
        • 2.Qc7#
      • 1...Kxe3!
    • 1.Se5+?
      • 1...Kxe5
        • 2.Bb8#
        • 2.Qc7#
      • 1...Kxe3!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...dxe3+
        • 2.Sd4#
      • 1...d3+
        • 2.Se5#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Kxd5
        • 2.Sxd4#
      • 1...Rxd5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(e);SBLOCK,XP(F)::QAB1(E)
    • B(a);N_GUARD::QAR1(E),XP(c)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • S(D);CHECK,P_SPINS(D),XP(c)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(C)
  • Actual
    • Q(E);N_PINP(c)
    • Threat
      • QAR1(E)
    • Vars
      • P(c);CHECK,SBLOCK,XP(C)::B(A)+S(D)
      • P(c);CHECK::B(A)+S(D)
      • K(d);P-FLIGHT,P_SPINP(c),XP(C)::QAR2(E)
      • K(d);S_FLIGHT,XP(F)::B(A)+S(D),XP(c)
      • R(e);SBLOCK,XP(F)::QAR1(E)
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