MESON Chess Problem Database

Problem Display
PID: 41580 (4q2r/7Q/3p1pp1/3Pbk1P/2P2p2/2PN4/b2BN3/1B2KRR1 w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 2002

4q2r/7Q/3p1pp1/3Pbk1P/2P2p2/2PN4/b2BN3/1B2KRR1

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sc5#
    • 1...Qa4
      • 2.Qxg6#
    • 1...Qb5
      • 2.Qxg6#
    • 1...Qc6
      • 2.Qxg6#
    • 1...Qd7
      • 2.Qxg6#
    • 1...Qe6
      • 2.Qxg6#
    • 1...Qe7
      • 2.Qxg6#
    • 1...Qa8
      • 2.Qxg6#
    • 1...Qb8
      • 2.Qxg6#
    • 1...Qc8
      • 2.Qxg6#
    • 1...Qd8
      • 2.Qxg6#
    • 1...Qf8
      • 2.Qxg6#
    • 1...Bxc3
      • 2.Rxf4#
    • 1...Bd4
      • 2.Rxf4#
  • Tries
    • 1.Sd4+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Sc5#
      • 1...Bxd4+!
    • 1.Sxe5+?
      • 1...Kxe5
        • 2.Bxf4#
      • 1...Bxb1!
  • Keys
    • 1.Rxg6!
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Sc5#
      • 1...Qxg6
        • 2.Qxg6#
      • 1...Bxc3
        • 2.Rxf4#
      • 1...Bd4
        • 2.Rxf4#
      • 1...f3
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • K(d);N_SPINP(b),P_SPINP(g),S_FLIGHT::B(A)+S(H),DCHECK
    • Q(h);N_GUARD::QAB1(L),XP(g)
    • B(c);N_GUARD,P_PINB(E),P_PINS(F),XP(G)::R1(C),XP(b)
    • B(c);N_GUARD,P_PINS(F)::R1(C),XP(b)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • B(c);CHECK,XS(F)
    • Try
      • S(H);CHECK,XB(c)
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT,XS(H)::B(E),XP(b)
      • Refutation
        • B(a);XB(A)
  • Actual
    • R(D);XP(g)
    • Threat
      • S(F)
    • Vars
      • K(d);N_SPINP(b),S_FLIGHT::B(A)+S(H),DCHECK
      • Q(h);OGATE,P_SPINQ(h),XR(D)::QAB1(L),XQ(h)
      • B(c);N_GUARD,P_PINB(E),P_PINS(F),XP(G)::R1(C),XP(b)
      • B(c);N_GUARD,P_PINS(F)::R1(C),XP(b)
      • P(b);::QAB(L)+R(D),DCHECK
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