MESON Chess Problem Database

Problem Display
PID: 81836 (8/2pp2K1/3p3Q/2P1P1p1/3k4/1P6/2RBRN2/3N4 w - - 0 1)

Kosolapov, Nikolai

1st Prize, Sveamiyski konkurs, 1967-1968

8/2pp2K1/3p3Q/2P1P1p1/3k4/1P6/2RBRN2/3N4

#2

10 + 5

56 The Problemist 2008

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Qxd6#
  • Tries
    • 1.Sc3?
      • 1...dxc5
        • 2.Re4#
      • 1...dxe5
        • 2.Be3#
      • 1...g4
        • 2.Qe3#
      • 1...d5
        • 2.Sb5#
      • 1...c6
        • 2.Qxd6#
      • 1...Kxc5!
    • 1.Bc1?
      • 1...dxc5
        • 2.Rcd2#
      • 1...dxe5
        • 2.Red2#
      • 1...g4
        • 2.Qd2#
      • 1...d5
        • 2.Bb2#
      • 1...c6
        • 2.Qxd6#
      • 1...Kd5!
    • 1.Bxg5?
      • 1...dxc5
        • 2.Rcd2#
      • 1...dxe5
        • 2.Red2#
      • 1...d5
        • 2.Qh4#
      • 1...c6
        • 2.Qxd6#
      • 1...Kd5!
    • 1.Qe6?
      • threat
        • 2.Be3#
        • 2.Rc4#
        • 2.Re4#
        • 2.Qc4#
      • 1...d5
        • 2.Be3#
        • 2.Qg4#
      • 1...dxe6!
    • 1.Qg6?
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...d5
        • 2.Qd3#
      • 1...Kd5!
    • 1.Qh7?
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...d5
        • 2.Qd3#
      • 1...Kd5!
  • Keys
    • 1.Se3!
      • 1...Kxe5
        • 2.Qf6#
      • 1...dxc5
        • 2.Bc3#
      • 1...dxe5
        • 2.Rc4#
      • 1...g4
        • 2.Qf4#
      • 1...d5
        • 2.Sf5#
      • 1...c6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::QAR2(I),XP(c)
  • Tries
    • Try
      • S(A);
      • Vars
        • P(c);SBLOCK,XP(G)::R1(D)
        • P(c);SBLOCK,XP(H)::B(C)
        • P(b);OGATE::QAB1(I)
        • P(c);SBLOCK::S(A)
        • P(d);N_GUARD::QAR2(I),XP(c)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • B(C);
      • Vars
        • P(c);SBLOCK,XP(G)::R(B)
        • P(c);SBLOCK,XP(H)::R(D)
        • P(b);OGATE::QAR2(I)
        • P(c);SBLOCK::B(C)
        • P(d);N_GUARD::QAR2(I),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(C);XP(b)
      • Vars
        • P(c);SBLOCK,XP(G)::R(B)
        • P(c);SBLOCK,XP(H)::R(D)
        • P(c);SBLOCK::QAR(I)
        • P(d);N_GUARD::QAR2(I),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(I);
      • Threat
        • DUALS(4)
      • Refutation
        • P(e);XQ(I)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAR1(I)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAR1(I)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XP(H)::QAB1(I)
      • P(c);SBLOCK,XP(G)::B(C)
      • P(c);SBLOCK,XP(H)::R1(B)
      • P(b);OGATE::QAR2(I)
      • P(c);SBLOCK::S(A)
      • P(d);N_GUARD::QAR2(I),XP(c)
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