MESON Chess Problem Database

Problem Display
PID: 178003 (8/8/8/8/7b/4Q2K/8/5k1N w - - 0 1)

Kichigin, Viktor Vladimirovich

Sahs Baltija, 1991

8/8/8/8/7b/4Q2K/8/5k1N

#2

3 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qxf2#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Bg5
      • 2.Sg3#
      • 2.Qf2#
    • 1...Bf6
      • 2.Sg3#
      • 2.Qf2#
    • 1...Be7
      • 2.Sg3#
      • 2.Qf2#
    • 1...Bd8
      • 2.Sg3#
      • 2.Qf2#
  • Tries
    • 1.Qd2?
      • 1...Kg1
        • 2.Qg2#
      • 1...Be1
        • 2.Qg2#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Bg5
        • 2.Qd1#
        • 2.Qf2#
      • 1...Bf6
        • 2.Qd1#
        • 2.Qf2#
      • 1...Be7
        • 2.Qd1#
        • 2.Qf2#
      • 1...Bd8
        • 2.Qd1#
        • 2.Qf2#
      • 1...Bg3!
    • 1.Qe2+?
      • 1...Kg1
        • 2.Qg2#
      • 1...Kxe2!
    • 1.Qf3+?
      • 1...Kg1
        • 2.Qg2#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Ke1!
  • Keys
    • 1.Kh2!
      • 1...Bg3+
        • 2.Sxg3#
      • 1...Be1
        • 2.Qd3#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Bg5
        • 2.Sg3#
        • 2.Qf2#
      • 1...Bf6
        • 2.Sg3#
        • 2.Qf2#
      • 1...Be7
        • 2.Sg3#
        • 2.Qf2#
      • 1...Bd8
        • 2.Sg3#
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::QAR1(B),XB(b)
    • B(b);N_GUARD::S(A),XB(b)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • B(b);SBLOCK::QAB1(B)
        • B(b);N_GUARD::QAR1(B),XB(b)
      • Refutation
        • B(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • B(b);N_GUARD,P_SPINB(b)::QAR1(B),XB(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • B(b);CHECK,N_GUARD::S(A),XB(b)
      • B(b);SBLOCK::QAB(B)
      • B(b);N_GUARD::QAR1(B),XB(b)
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