MESON Chess Problem Database

Problem Display
PID: 66801 (1brk2K1/r1R1R3/1q1PP3/2N5/1B6/8/3Q4/8 w - - 0 1)

Udartsev, Valentin Filipovich

1st Prize, Tuvinskaya Pravda, 1981

1brk2K1/r1R1R3/1q1PP3/2N5/1B6/8/3Q4/8

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Qxd6#
    • 1...Ra1
      • 2.Rcd7#
    • 1...Ra2
      • 2.Rcd7#
    • 1...Ra3
      • 2.Rcd7#
    • 1...Ra4
      • 2.Rcd7#
    • 1...Ra5
      • 2.Rcd7#
    • 1...Ra6
      • 2.Rcd7#
    • 1...Ra8
      • 2.Rcd7#
  • Keys
    • 1.d7!
      • threat
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Kxc7+
        • 2.d8S#
      • 1...Kxe7+
        • 2.d8Q#
      • 1...Qxe6+
        • 2.Sxe6#
      • 1...Qxc5
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qxc7
        • 2.Re8#
      • 1...Qxb4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Raxc7
        • 2.Re8#
      • 1...Rcxc7
        • 2.Re8#
      • 1...Bxc7
        • 2.Re8#
      • 1...Qb5
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa5
        • 2.dxc8Q#
        • 2.dxc8S#
        • 2.dxc8B#
        • 2.dxc8R#
      • 1...Qa6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qc6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qd6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qb7
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Ra1
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Ra2
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Ra3
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Ra4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Ra5
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Ra6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rb7
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Ra8
        • 2.dxc8Q#
        • 2.dxc8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • Q(a);OGATE,P_SPINQ(a),XP(D)::QAR2(A),XQ(a)
    • R(b);N_GUARD::R1(F)
  • Actual
    • P(D);
    • Threat
      • PXR(d)=Q
    • Vars
      • K(e);CHECK,OGATE,S_FLIGHT,XR(F)::P=S
      • K(e);CHECK,OGATE,S_FLIGHT,XR(G)::P=Q
      • Q(a);CHECK,XP(E)::S(C),XQ(a)
      • Q(a);XS(C)::PXR(d)=Q
      • Q(a);SBLOCK,XR(F)::R1(G)
      • Q(a);XB(B)::PXR(d)=Q
      • R(b);SBLOCK,XR(F)::R1(G)
      • R(d);SBLOCK,XR(F)::R1(G)
      • B(c);SBLOCK,XR(F)::R1(G)
      • Q(a);::PXR(d)=Q
      • R(b);::PXR(d)=Q
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