MESON Chess Problem Database

Problem Display
PID: 234988 (Q7/1R6/2P1N3/2pk4/8/4K1B1/3pP3/3B4 w - - 0 1)

Akimov, Nikolai Nikolaevich

64 Shakhmatnoe obozrenie, 2015

Q7/1R6/2P1N3/2pk4/8/4K1B1/3pP3/3B4

#2

8 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sc7+?
      • 1...Kxc6
        • 2.Ba4#
      • 1...Kc4!
    • 1.Sd8?
      • 1...c4
        • 2.Rb5#
        • 2.Qa5#
      • 1...Kc4!
    • 1.Sf8?
      • 1...Kxc6
        • 2.Rb1#
        • 2.Rb2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb8#
      • 1...c4
        • 2.Rb5#
      • 1...Kc4!
    • 1.Bb3+?
      • 1...Kxc6
        • 2.Sd8#
        • 2.Qa6#
        • 2.Qc8#
      • 1...c4!
    • 1.Re7?
      • 1...c4
        • 2.c7#
      • 1...Kc4!
    • 1.Qa2+?
      • 1...Kxc6
        • 2.Sd8#
      • 1...c4!
    • 1.Qc8?
      • 1...c4
        • 2.Rb5#
        • 2.Qd7#
      • 1...Kc4!
    • 1.Qd8+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxc6
        • 2.Rb6#
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Qe8?
      • 1...c4
        • 2.Rb5#
        • 2.Qd7#
      • 1...Kc4!
    • 1.Qh8?
      • 1...Kc4
        • 2.Bb3#
      • 1...Kxc6
        • 2.Qh1#
      • 1...Kxe6
        • 2.Qe5#
      • 1...c4!
  • Keys
    • 1.Qf8!
      • 1...Kc4
        • 2.Qxc5#
      • 1...Kxc6
        • 2.Qf3#
      • 1...Kxe6
        • 2.Qf7#
      • 1...c4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(E)::B(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(F);
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(F);
      • Vars
        • P(b);OGATEB,SBLOCK::R(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(A);CHECK
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • R(G);
      • Vars
        • P(b);SBLOCK::QAB(H)+P(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(E)::S(F)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(H);
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(H)
      • Refutation
        • K(c);S_FLIGHT,XS(F)
    • Try
      • Q(H);
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(c);S_FLIGHT::B(A)
        • K(c);S_FLIGHT,XP(E)::QAB(H)
        • K(c);S_FLIGHT,XS(F)::QAR1(H)
      • Refutation
        • P(b);
  • Actual
    • Q(H);
    • Vars
      • K(c);S_FLIGHT::QAR1(H),XP(b)
      • K(c);S_FLIGHT,XP(E)::QAB(H)
      • K(c);OGATEB,S_FLIGHT,XS(F)::QAB1(H)
      • P(b);SBLOCK::QAR1(H)
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