MESON Chess Problem Database

Problem Display
PID: 219873 (8/8/1KPBPR2/1N1k1n2/3p4/3p4/3P4/3Q4 w - - 0 1)

Sorokin, Evgeny Pavlovich

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Land og Folk, 1971

8/8/1KPBPR2/1N1k1n2/3p4/3p4/3P4/3Q4

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qh1#
  • Tries
    • 1.Sc7+?
      • 1...Kc4
        • 2.Qa4#
      • 1...Ke4
        • 2.Qg4#
        • 2.Qh1#
      • 1...Kxd6!
    • 1.Rxf5+?
      • 1...Kc4
        • 2.Sa3#
        • 2.Qa4#
      • 1...Ke4
        • 2.Qf3#
        • 2.Qg4#
      • 1...Kxe6!
    • 1.Qa4?
      • 1...Sxd6
        • 2.Qxd4#
      • 1...Se3
        • 2.Qxd4#
      • 1...Sg3
        • 2.Qxd4#
      • 1...Sh4
        • 2.Qxd4#
      • 1...Sh6
        • 2.Qxd4#
      • 1...Se7
        • 2.Qxd4#
      • 1...Sg7
        • 2.Qxd4#
      • 1...Ke4!
    • 1.Qg4?
      • 1...Sxd6
        • 2.Qxd4#
      • 1...Se3
        • 2.Qxd4#
      • 1...Sg3
        • 2.Qxd4#
      • 1...Sh4
        • 2.Qxd4#
      • 1...Sh6
        • 2.Qxd4#
      • 1...Se7
        • 2.Qxd4#
      • 1...Sg7
        • 2.Qxd4#
      • 1...Kc4!
    • 1.Qh5?
      • 1...Ke4
        • 2.Qh1#
        • 2.Qxf5#
      • 1...Kc4!
  • Keys
    • 1.Qa1!
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke4
        • 2.Qh1#
      • 1...Sxd6
        • 2.Qxd4#
      • 1...Se3
        • 2.Qxd4#
      • 1...Sg3
        • 2.Qxd4#
      • 1...Sh4
        • 2.Qxd4#
      • 1...Sh6
        • 2.Qxd4#
      • 1...Se7
        • 2.Qxd4#
      • 1...Sg7
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT,XB(F)
    • Try
      • R(H);CHECK,XS(d)
      • Refutation
        • K(c);S_FLIGHT,XP(G)
    • Try
      • Q(A);
      • Vars
        • S(d);N_GUARD,XB(F)::QAR1(A),XP(b)
        • S(d);N_GUARD::QAR1(A),XP(b)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(d);N_GUARD,XB(F)::QAR1(A),XP(b)
        • S(d);N_GUARD::QAR1(A),XP(b)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);P_PINS(d)
      • Refutation
        • K(c);N_SPINS(d),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::QAB(A)
      • S(d);N_GUARD,XB(F)::QAR1(A),XP(b)
      • S(d);N_GUARD::QAR1(A),XP(b)
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