MESON Chess Problem Database

Problem Display
PID: 245151 (4bqBB/1N1p4/2P1r1Q1/NRPknRp1/5br1/2PPp1p1/1K6/8 w - - 0 1)

Maleika, Gerhard

Scacchi e Scienze Applicate, 2010

4bqBB/1N1p4/2P1r1Q1/NRPknRp1/5br1/2PPp1p1/1K6/8

#2

12 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.Rxc5#
    • 1...Qd6
      • 2.cxd6#
    • 1...dxc6
      • 2.Bxe6#
      • 2.Qxe6#
    • 1...d6
      • 2.Bxe6#
      • 2.Qxe6#
      • 2.cxd6#
  • Tries
    • 1.Rxf8?
      • threat
        • 2.Qe4#
      • 1...Sxd3+
        • 2.Qxd3#
      • 1...Sc4+
        • 2.dxc4#
      • 1...Sxg6
        • 2.c4#
      • 1...Sf7
        • 2.c4#
      • 1...Bxg6!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Qe4#
      • 1...Sxd3+
        • 2.Qxd3#
      • 1...Sc4+
        • 2.dxc4#
      • 1...Rxc6
        • 2.Rxd7#
      • 1...Rxg6
        • 2.Rxd7#
      • 1...Sxc6
        • 2.c4#
      • 1...Sxg6
        • 2.c4#
      • 1...Sxf7
        • 2.c4#
      • 1...Rf6
        • 2.Rxd7#
      • 1...Rd6
        • 2.cxd6#
      • 1...Re7
        • 2.Qd6#
      • 1...Sf3
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • Q(k);OGATE,P_SPINQ(k),XP(F)::R1(E),XQ(k)
    • Q(k);OGATE::R(E)+P(F),XQ(k)
  • Tries
    • Try
      • R(G);N_PINS(f),XQ(k)
      • Threat
        • QAB1(I)
      • Vars
        • S(f);CHECK,OGATE,XP(C)::QAR2(I),XS(f)
        • S(f);CHECK,OGATE::P(C),XS(f)
        • S(f);N_GUARD,XQ(I)::P(B)
        • S(f);N_GUARD,N_SPINR(h)::P(B)
      • Refutation
        • B(j);XQ(I)
  • Actual
    • R(G);N_PINR(h),N_PINS(f)
    • Threat
      • QAB1(I)
    • Vars
      • S(f);CHECK,OGATE,XP(C)::QAR2(I),XS(f)
      • S(f);CHECK,OGATE::P(C),XS(f)
      • R(h);XP(H)::B(K)+R(G),DCHECK,XP(i)
      • R(h);XQ(I)::B(K)+R(G),DCHECK,XP(i)
      • S(f);N_GUARD,XP(H)::P(B)
      • S(f);N_GUARD,XQ(I)::P(B)
      • S(f);N_GUARD,XR(G)::P(B)
      • R(h);::B(K)+R(G),DCHECK,XP(i)
      • R(h);OGATE::R(E)+P(F),XR(h)
      • R(h);OGATE::QAR1(I)
      • S(f);N_GUARD::P(B)
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