MESON Chess Problem Database

Problem Display
PID: 10797 (8/8/8/3NP3/1N1kp1Q1/1K6/8/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Prize, Problemist Dalnego Vostoka, 1968

8/8/8/3NP3/1N1kp1Q1/1K6/8/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
6167 Viktor Chepizhny 2007
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe2?
      • 1...Kc5
        • 2.Qc4#
      • 1...e3
        • 2.Qxe3#
      • 1...Kxe5!
    • 1.Qe6?
      • 1...Kc5
        • 2.Qb6#
      • 1...e3!
    • 1.Qg1+?
      • 1...e3
        • 2.Qxe3#
      • 1...Kxe5!
    • 1.Qg3?
      • threat
        • 2.Qc3#
      • 1...e3
        • 2.Qxe3#
      • 1...Kc5!
    • 1.Qxe4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kxe4!
    • 1.Qh4?
      • 1...Kxe5
        • 2.Qf6#
      • 1...Kc5!
    • 1.Qg5?
      • 1...e3
        • 2.Qxe3#
      • 1...Kc5!
    • 1.Qg6?
      • 1...Kc5
        • 2.Qb6#
      • 1...Kxe5
        • 2.Qf6#
      • 1...e3!
  • Keys
    • 1.Sd3!
      • 1...Kxd3
        • 2.Qd1#
      • 1...Kxd5
        • 2.Qd7#

Anticipated by 207099(1866), 56675(1923), 157070(1955)

This anticipates 173964(2005), 164630(2014), 163268(2017)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XP(E)
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • P(b);P_SPINP(b)::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(E)
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XP(E)::QAB1(C)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);OGATEB,S_FLIGHT,XP(E)::QAB1(C)
      • Refutation
        • P(b);
  • Actual
    • S(B);
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(B)::QAR2(C)
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(D)::QAR2(C)
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