MESON Chess Problem Database

Problem Display
PID: 51653 (1rR5/8/1pp1PQ2/1NNk3q/2p3pp/P7/2P5/1K3Bbr w - - 0 1)

Hebelt, Vaclav

3rd Prize, Shakhmaty v SSSR, 1953

1rR5/8/1pp1PQ2/1NNk3q/2p3pp/P7/2P5/1K3Bbr

#2

9 + 10

56 The Problemist 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.Qg5#
      • 2.Qf5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qg5
      • 2.Qxg5#
    • 1...Qh6
      • 2.Qf5#
    • 1...Bh2
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...bxc5
      • 2.Bg2#
  • Tries
    • 1.Sc3+?
      • 1...Kd6
        • 2.S5e4#
      • 1...Kxc5!
    • 1.Sc7+?
      • 1...Kd6
        • 2.Se4#
      • 1...Kxc5!
    • 1.e7?
      • threat
        • 2.Qd6#
      • 1...Kxc5
        • 2.Qxc6#
      • 1...Bxc5
        • 2.Sc3#
      • 1...bxc5
        • 2.Bg2#
      • 1...cxb5
        • 2.Bg2#
      • 1...Qe5
        • 2.Qxc6#
      • 1...Qh6
        • 2.Qf5#
      • 1...Bh2
        • 2.Qd4#
      • 1...Qg6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd6#
      • 1...Kxc5
        • 2.Qxc4#
      • 1...Bxc5
        • 2.Sc7#
      • 1...bxc5
        • 2.Bxc4#
      • 1...cxb5
        • 2.Bg2#
      • 1...Qe5
        • 2.Qxc4#
      • 1...Bh2
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD,P_PINP(C)::QAR2(H),XQ(g)
    • Q(g);N_GUARD::QAR(H),XQ(g)
    • Q(g);N_GUARD::QAR2(H)
    • B(a);N_GUARD,P_PINB(B)::QAR1(H)
    • B(a);N_GUARD,P_PINB(B)::QAR1(H),XB(a)
    • P(h);P_PINS(E),SBLOCK,XS(F)::B(B)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);P-FLIGHT::S(F)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(i),XS(F)
    • Try
      • S(E);CHECK
      • Vars
        • K(f);P-FLIGHT::S(F)
      • Refutation
        • K(f);P-FLIGHT,XS(F)
    • Try
      • P(G);
      • Threat
        • QAR1(H)
      • Vars
        • K(f);P-FLIGHT,P_SPINP(i),XS(F)::QAR1(H),XP(i)
        • B(a);P_PINB(B),SBLOCK,XS(F)::S(E)
        • P(h);P_PINS(E),SBLOCK,XS(F)::B(B)
        • P(i);XS(E)::B(B)
        • Q(g);SBLOCK::QAB1(H),XP(i)
        • Q(g);N_GUARD::QAR2(H)
        • B(a);N_GUARD,P_PINB(B)::QAR1(H)
      • Refutation
        • Q(g);P_PINP(C)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(f);P-FLIGHT,P_SPINP(i),XS(F)::QAR1(H),XP(c)
      • B(a);P_PINB(B),SBLOCK,XS(F)::S(E)
      • P(h);P_PINS(E),SBLOCK,XS(F)::B(B),XP(c)
      • P(i);XS(E)::B(B)
      • Q(g);SBLOCK::QAB1(H),XP(c)
      • B(a);N_GUARD,P_PINB(B)::QAR1(H)
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