MESON Chess Problem Database

Problem Display
PID: 18338 (4qbQ1/7B/1n3P2/2p2Np1/b1pPk1NR/K1p4r/4PR2/B7 w - - 0 1)

Mansfield, Comins

6th HM., Chess Life, 1955-1956

4qbQ1/7B/1n3P2/2p2Np1/b1pPk1NR/K1p4r/4PR2/B7

#2

11 + 10

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Qe6#
    • 1...Qh5
      • 2.Qe6#
    • 1...Qg6
      • 2.Qe6#
    • 1...Qe6
      • 2.Qxe6#
    • 1...Qa8
      • 2.Qe6#
    • 1...Qd8
      • 2.Qe6#
    • 1...Be7
      • 2.Qe6#
    • 1...c2+
      • 2.Sg3#
    • 1...cxd4+
      • 2.Sd6#
  • Tries
    • 1.Sge3+?
      • 1...gxh4
        • 2.Qg4#
      • 1...g4
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Rxh4!
    • 1.Rf3?
      • threat
        • 2.Sf2#
      • 1...cxd4+
        • 2.Sd6#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Qf7!
    • 1.Rf4+?
      • 1...gxf4
        • 2.Sf2#
      • 1...Kxf4!
  • Keys
    • 1.f7!
      • threat
        • 2.Sf6#
      • 1...c2+
        • 2.Sfe3#
      • 1...cxd4+
        • 2.Se7#
      • 1...Kd5
        • 2.fxe8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(i);N_GUARD::QAR2(K)
    • Q(i);N_GUARD::QAR2(K),XQ(i)
    • B(j);S_CUTQ(i)::QAR2(K)
    • P(a);CHECK::B(J)+S(H),DCHECK
    • P(f);CHECK,SBLOCK,XP(E)::B(J)+S(H),DCHECK
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • P(g);OGATE,XR(G)::QAR2(K)
      • Refutation
        • R(b);XR(G)
    • Try
      • R(C);
      • Threat
        • R(G)+S(F),DCHECK
      • Vars
        • P(f);CHECK,SBLOCK,XP(E)::B(J)+S(H),DCHECK
        • Q(i);N_GUARD::QAR2(K),XQ(i)
      • Refutation
        • Q(i);
    • Try
      • R(C);CHECK
      • Vars
        • P(g);XR(C)::S(F)
      • Refutation
        • K(e);P-FLIGHT,XR(C)
  • Actual
    • P(I);
    • Threat
      • R(G)+S(F),DCHECK
    • Vars
      • P(a);CHECK::B(J)+S(H)
      • P(f);CHECK,SBLOCK,XP(E)::B(J)+S(H)
      • K(e);S_FLIGHT::PXQ(i)=Q
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