MESON Chess Problem Database

Problem Display
PID: 252319 (5Q2/K7/2ppp3/3kp3/1R6/1PP5/6P1/8 w - - 0 1)

Russkikh, Vladimir Evdokimovich

Zadachi i Etyudi, 2004

5Q2/K7/2ppp3/3kp3/1R6/1PP5/6P1/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qa8#
  • Tries
    • 1.Kb6?
      • 1...c5
        • 2.Qa8#
      • 1...e4!
    • 1.Ra4?
      • 1...Kc5
        • 2.Ra5#
      • 1...c5
        • 2.Qa8#
      • 1...e4!
    • 1.Rc4?
      • 1...c5
        • 2.Qa8#
      • 1...e4!
    • 1.Rb5+?
      • 1...Ke4
        • 2.Qf3#
      • 1...c5
        • 2.Qa8#
      • 1...cxb5!
    • 1.Qg7?
      • 1...e4
        • 2.Qd4#
      • 1...c5
        • 2.Qb7#
      • 1...Kc5!
    • 1.Qf2?
      • 1...e4
        • 2.Qd4#
      • 1...c5!
    • 1.Qa8?
      • 1...e4
        • 2.Rb5#
      • 1...Kc5!
    • 1.Qd8?
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qa8#
      • 1...e4!
    • 1.Qh8?
      • 1...e4
        • 2.Qd4#
      • 1...c5
        • 2.Qa8#
      • 1...Kc5!
  • Keys
    • 1.Re4!
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kc5
        • 2.Rxe5#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAB(F)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • P(c);OGATEB::QAB(F)
      • Refutation
        • P(b);
    • Try
      • R(D);
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(d),S_CUTP(c)::R(D)
        • P(c);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • P(b);
    • Try
      • R(D);
      • Vars
        • P(c);OGATEB::QAB(F)
      • Refutation
        • P(b);
    • Try
      • R(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • P(c);P_SPINP(c)::QAB(F)
      • Refutation
        • P(c);XR(D)
    • Try
      • Q(F);
      • Vars
        • P(b);OGATE::QAR1(F)
        • P(c);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • P(b);N_GUARD::QAR1(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);P_PINP(c)
      • Vars
        • P(b);SBLOCK::R(D)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT
    • Try
      • Q(F);P_PINP(d)
      • Vars
        • K(a);N_SPINP(d),P-FLIGHT,S_CUTP(c)::QAR2(F)
        • P(c);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • P(b);
    • Try
      • Q(F);
      • Vars
        • P(b);OGATE::QAR1(F)
        • P(c);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(D);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(D)::QAB1(F)
      • K(a);N_GUARD,P-FLIGHT,P_SPINP(d)::R(D),XP(b)
      • P(c);OGATEB,SBLOCK::QAB(F)
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