MESON Chess Problem Database

Problem Display
PID: 138886 (3Q4/3B4/5K2/2p5/ppkp3R/b4N2/1nP5/B7 w - - 0 1)

Chepizhni, Viktor Ivanovich

Rudenko, Valentin Fedorovich

2nd Prize, Szachy, 1972

3Q4/3B4/5K2/2p5/ppkp3R/b4N2/1nP5/B7

#2

7 + 7

6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Bb5#
    • 1...Sd1
      • 2.Qg8#
    • 1...Sd3
      • 2.Qg8#
  • Tries
    • 1.Sd2+?
      • 1...Kd5
        • 2.Bxa4#
        • 2.Bb5#
        • 2.Be8#
      • 1...Kc3!
    • 1.Se5+?
      • 1...Kd5
        • 2.Bh3#
        • 2.Bxa4#
        • 2.Bb5#
        • 2.Bf5#
        • 2.Bc6#
        • 2.Be6#
        • 2.Bc8#
        • 2.Be8#
      • 1...Kc3!
    • 1.Qb6?
      • 1...Kc3
        • 2.Qxc5#
      • 1...Kd5
        • 2.Be6#
        • 2.Qe6#
      • 1...Sd1
        • 2.Be6#
        • 2.Qe6#
      • 1...Sd3
        • 2.Be6#
        • 2.Qe6#
      • 1...b3!
    • 1.Qc7?
      • 1...Kc3
        • 2.Qxc5#
      • 1...Kd5
        • 2.Be6#
      • 1...Sd1
        • 2.Rxd4#
      • 1...Sd3
        • 2.Rxd4#
      • 1...b3!
    • 1.Qe7?
      • 1...Kc3
        • 2.Qxc5#
      • 1...Kd5
        • 2.Qe6#
      • 1...Sd1
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sd3
        • 2.Qe6#
        • 2.Qf7#
      • 1...b3!
  • Keys
    • 1.Qa5!
      • 1...Kc3
        • 2.Qxc5#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Sd1
        • 2.Be6#
      • 1...Sd3
        • 2.Be6#
      • 1...b3
        • 2.Be6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINP(f),S_FLIGHT::QAR(G)+B(F)
    • S(a);::QAB(G)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(e);N_SPINP(f),P-FLIGHT,P_SPINS(a)
    • Try
      • S(C);CHECK
      • Refutation
        • K(e);N_SPINP(f),P-FLIGHT,P_SPINS(a)
    • Try
      • Q(G);
      • Vars
        • K(e);N_SPINP(f),P-FLIGHT,P_SPINS(a)::QAR2(G),XP(g)
      • Refutation
        • P(d);
    • Try
      • Q(G);
      • Vars
        • K(e);N_SPINP(f),P-FLIGHT,P_SPINP(g),P_SPINS(a)::QAR2(G),XP(g)
        • K(e);N_SPINP(f),S_FLIGHT::B(F)
        • S(a);::R1(D),XP(f)
      • Refutation
        • P(d);
    • Try
      • Q(G);
      • Vars
        • K(e);N_SPINP(f),P-FLIGHT,P_SPINS(a)::QAR2(G),XP(g)
        • K(e);N_SPINP(f),S_FLIGHT::QAB1(G)
      • Refutation
        • P(d);
  • Actual
    • Q(G);
    • Vars
      • K(e);N_SPINP(f),P-FLIGHT,P_SPINP(d),P_SPINS(a)::QAR2(G),XP(g)
      • K(e);N_SPINP(f),P_SPINP(g),S_FLIGHT::R1(D),XP(f)
      • S(a);::B(F)
      • P(d);::B(F)
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