MESON Chess Problem Database

Problem Display
PID: 120604 (B4Q2/1n4p1/2r1P1P1/nPNk4/2pP4/2K3N1/8/8 w - - 0 1)

Heinonen, Unto

Helsinki Chess Club-110 JT, 1998

B4Q2/1n4p1/2r1P1P1/nPNk4/2pP4/2K3N1/8/8

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qf3#
      • 2.Qf5#
    • 1...Sd8
      • 2.Qxd8#
  • Tries
    • 1.Sge4?
      • threat
        • 2.Qf5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rxe6!
    • 1.Sxb7?
      • threat
        • 2.Qf5#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Rxe6
        • 2.Qc5#
      • 1...Sxb7!
    • 1.Qxg7?
      • threat
        • 2.Qe5#
      • 1...Kd6
        • 2.Qd7#
      • 1...Rxe6!
  • Keys
    • 1.Sce4!
      • threat
        • 2.Qf5#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Rxe6
        • 2.Qc5#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD,P_SPINR(d)::QAR(I),XS(e)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR2(I)
      • Vars
        • S(e);N_GUARD,P_SPINR(d)::QAR1(I),XS(e)
      • Refutation
        • R(d);P_SPINS(e),XP(F)
    • Try
      • S(E);XS(e)
      • Threat
        • QAR2(I)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(I)
        • R(d);N_GUARD,SBLOCK,XP(F)::QAR1(I)
      • Refutation
        • S(b);XS(E)
    • Try
      • Q(I);XP(f)
      • Threat
        • QAR1(I)
      • Vars
        • K(c);P-FLIGHT::QAR1(I)
      • Refutation
        • R(d);P_SPINS(e),XP(F)
  • Actual
    • S(E);
    • Threat
      • QAR2(I)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(I)
      • R(d);N_GUARD,P_SPINS(e),SBLOCK,XP(F)::QAR1(I)
      • S(e);N_GUARD,P_SPINR(d)::QAR1(I),XS(e)
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