MESON Chess Problem Database

Problem Display
PID: 152778 (4Q3/8/B2pp1K1/2PPp3/3Pkp2/8/2P1P2B/3R1N2 w - - 0 1)

Alekseev, Yuri Mikhailovich

2nd HM., Wola Gulowska, 2004

4Q3/8/B2pp1K1/2PPp3/3Pkp2/8/2P1P2B/3R1N2

#2

11 + 5

15323 FIDE Album (2004-2006) 2013
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qa8#
    • 1...exd4
      • 2.Qxe6#
  • Tries
    • 1.Sg3+?
      • 1...Ke3
        • 2.Bg1#
      • 1...Kxd5
        • 2.Qa8#
        • 2.c4#
      • 1...fxg3!
    • 1.Qf7?
      • 1...Kxd5
        • 2.Qb7#
      • 1...exd4
        • 2.Qxe6#
      • 1...exd5
        • 2.Qf5#
      • 1...f3
        • 2.Qxf3#
      • 1...dxc5!
    • 1.Qxe6?
      • 1...dxc5
        • 2.Qxe5#
      • 1...f3!
    • 1.dxe5?
      • 1...Kxe5
        • 2.Qxe6#
      • 1...dxe5
        • 2.Qa4#
      • 1...exd5
        • 2.exd6#
      • 1...f3
        • 2.Qa4#
      • 1...dxc5!
  • Keys
    • 1.Qa4!
      • 1...Kxd5
        • 2.Bb7#
      • 1...exd4
        • 2.Qxd4#
      • 1...dxc5
        • 2.dxc5#
      • 1...exd5
        • 2.Bd3#
      • 1...f3
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XP(H)::QAB(K)
    • P(c);OGATEB,P_SPINP(e),XP(F)::QAR2(K),XP(e)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::B(E)
      • Refutation
        • P(b);XS(B)
    • Try
      • Q(K);
      • Vars
        • K(a);OGATEB,P_SPINP(e),S_FLIGHT,XP(H)::QAB(K)
        • P(c);OGATEB,XP(F)::QAR2(K),XP(e)
        • P(e);N_GUARD,SBLOCK,XP(H)::QAB1(K)
        • P(b);OGATE::QAB1(K),XP(b)
      • Refutation
        • P(d);XP(G)
    • Try
      • Q(K);P_PINP(c),XP(e)
      • Vars
        • P(d);N_GUARD,XP(G)::QAR1(K),XP(c)
      • Refutation
        • P(b);
    • Try
      • P(F);XP(c)
      • Vars
        • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XP(F)::QAR1(K),XP(e)
        • P(d);SBLOCK,XP(F)::QAR(K)
        • P(e);XP(H)::QAR(K)+P(F),XP(d)
        • P(b);::QAR(K)
      • Refutation
        • P(d);XP(G)
  • Actual
    • Q(K);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XP(H)::B(I)
      • P(c);OGATE,P_SPINP(c),XP(F)::QAR1(K),XP(c)
      • P(d);OGATE,XP(G)::QAR(K)+P(F),XP(d)
      • P(e);SBLOCK,XP(H)::B(I)
      • P(b);::QAR(K)+P(F),XP(c)
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