MESON Chess Problem Database

Problem Display
PID: 169079 (1R1NqB2/P1k1P3/bpB4Q/3p4/3K1p2/4p1b1/8/8 w - - 0 1)

Kapustin, Fedor Mikhailovich

Permyakov, Evgeni Nikolaevich

3rd Prize, SuperProblem 070. TT, 2013

1R1NqB2/P1k1P3/bpB4Q/3p4/3K1p2/4p1b1/8/8

#2

8 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Qxc6#
    • 1...Qxd8
      • 2.exd8Q#
      • 2.exd8B#
    • 1...Be1
      • 2.Qxf4#
    • 1...Bf2
      • 2.Qxf4#
    • 1...Bh4
      • 2.Qxf4#
  • Tries
    • 1.Bd7?
      • threat
        • 2.Qc6#
      • 1...Kxd7
        • 2.Qc6#
      • 1...Qxd7
        • 2.Qxb6#
      • 1...Bb5
        • 2.Rb7#
      • 1...Bb7
        • 2.Rxb7#
      • 1...Qg6!
    • 1.Bxe8?
      • threat
        • 2.Qxb6#
        • 2.Qc6#
      • 1...Bb5
        • 2.Qxb6#
      • 1...b5
        • 2.Qb6#
        • 2.Qc6#
      • 1...Bb7!
    • 1.Rb7+?
      • 1...Kc8
        • 2.a8Q#
        • 2.a8R#
      • 1...Bxb7!
    • 1.Qe6?
      • threat
        • 2.Qe5#
      • 1...Qxc6
        • 2.Qxc6#
      • 1...Qxe7
        • 2.Qxe7#
      • 1...Qxd8
        • 2.exd8Q#
        • 2.exd8B#
      • 1...Qh5
        • 2.Qd7#
      • 1...Qg6
        • 2.Qd7#
      • 1...Qd7
        • 2.Qxd7#
      • 1...f3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe5#
      • 1...Kd6
        • 2.Qe5#
      • 1...Qxc6
        • 2.e8S#
      • 1...Qxe7
        • 2.Qxe7#
      • 1...Qxd8
        • 2.exd8S#
      • 1...Qh5
        • 2.e8S#
      • 1...Qg6
        • 2.e8S#
      • 1...Qd7
        • 2.e8S#
      • 1...f3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(h);OGATE,XB(B)::QAR1(C),XQ(h)
    • Q(h);OGATE,XS(G)::PXQ(h)=Q
    • B(b);N_GUARD::QAB(C),XP(c)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(g);P-FLIGHT,XB(B)::QAB1(C)
        • Q(h);SBLOCK,XB(B)::QAB1(C),XP(f)
        • B(e);N_GUARD::R1(F)
        • B(e);N_GUARD::R1(F),XB(e)
      • Refutation
        • Q(h);
    • Try
      • B(B);XQ(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::QAB1(C),XP(f)
      • Refutation
        • B(e);
    • Try
      • R(F);CHECK
      • Vars
        • K(g);P-FLIGHT::P=Q
      • Refutation
        • B(e);XR(F)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • Q(h);OGATE,XB(B)::QAR1(C),XQ(h)
        • Q(h);OGATE,XP(E)::QAR2(C),XQ(h)
        • Q(h);OGATE,XS(G)::PXQ(h)=Q
        • Q(h);N_GUARD::QAR1(C)
        • Q(h);N_GUARD::QAR1(C),XQ(h)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • K(g);S_FLIGHT::QAB1(C)
      • Q(h);OGATE,XB(B)::P=S
      • Q(h);OGATE,P_SPINQ(h),XP(E)::QAR2(C),XQ(h)
      • Q(h);OGATE,XS(G)::PXQ(h)=S
      • Q(h);OGATE::P=S
      • P(c);OGATEB::QAB(C),XB(b)
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