MESON Chess Problem Database

Problem Display
PID: 263260 (3N4/3pB3/2pPPp2/Rnp1k3/2P1b2N/1P3pP1/2P5/K2Q3B w - - 0 1)

Kopaev, Viacheslav Georgievich

Szachy, 1985

3N4/3pB3/2pPPp2/Rnp1k3/2P1b2N/1P3pP1/2P5/K2Q3B

#2

13 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd6
      • 2.Bxd6#
      • 2.Qxd6#
    • 1...f5
      • 2.Sg6#
    • 1...dxe6
      • 2.Sf7#
  • Tries
    • 1.Qd2?
      • 1...Bxc2
        • 2.Qf4#
      • 1...Sxd6
        • 2.Bxd6#
        • 2.Qc3#
        • 2.Qxd6#
      • 1...dxe6
        • 2.Sf7#
      • 1...Bd3
        • 2.Qf4#
      • 1...Bd5
        • 2.Qf4#
      • 1...Bf5
        • 2.Qf4#
      • 1...Bg6
        • 2.Qf4#
      • 1...Bh7
        • 2.Qf4#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sa7
        • 2.Qc3#
      • 1...Sc7
        • 2.Qc3#
      • 1...f5
        • 2.Sg6#
      • 1...f2!
  • Keys
    • 1.Qe1!
      • 1...Kd4
        • 2.Bxf6#
      • 1...Sxd6
        • 2.Qc3#
      • 1...dxe6
        • 2.Sxc6#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd4
        • 2.Rxc5#
      • 1...Sa7
        • 2.Qc3#
      • 1...Sc7
        • 2.Qc3#
      • 1...f2
        • 2.Qxe4#
      • 1...f5
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(g);SBLOCK,S_CUTB(b)::S(H)
    • P(h);SBLOCK,XP(K)::S(M)
  • Tries
    • Try
      • Q(B);
      • Vars
        • B(b);XP(D)::QAB1(B)
        • P(h);SBLOCK,XP(K)::S(M)
        • B(b);::QAB1(B)
        • S(c);N_GUARD,P_SPINP(d)::QAB(B)
        • S(c);N_GUARD,P_SPINP(d)::QAB(B),XS(c)
        • S(c);P_SPINP(d),SBLOCK::QAB1(B)
        • P(g);SBLOCK,S_CUTB(b)::S(H)
      • Refutation
        • P(a);
  • Actual
    • Q(B);P_PINB(b)
    • Vars
      • K(e);N_GUARD,N_SPINB(b),S_FLIGHT::B(L),XP(g)
      • S(c);N_GUARD,P_SPINP(d),XP(J)::QAB(B)
      • P(h);N_GUARD,SBLOCK,XP(K)::S(M),XP(f)
      • S(c);N_GUARD,P_SPINP(d)::QAB(B)
      • S(c);N_GUARD,P_SPINP(d)::QAB(B),XS(c)
      • S(c);OGATE,P_SPINP(d),SBLOCK::R(I),XP(d)
      • P(a);::QAR1(B),XB(b)
      • P(g);SBLOCK::S(H),XP(a)
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