MESON Chess Problem Database

Problem Display
PID: 165520 (8/7n/4Q2R/6kb/8/4K3/8/5N2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/7n/4Q2R/6kb/8/4K3/8/5N2

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qg6#
    • 1...Be2
      • 2.Qg6#
    • 1...Bf3
      • 2.Qg6#
    • 1...Bg4
      • 2.Qg6#
    • 1...Bg6
      • 2.Qxg6#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qf4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kxh6!
    • 1.Qd5+?
      • 1...Kg4
        • 2.Qxh5#
      • 1...Kh4
        • 2.Qxh5#
      • 1...Kxh6!
    • 1.Qe5+?
      • 1...Kg4
        • 2.Qxh5#
      • 1...Kh4
        • 2.Qg3#
        • 2.Qxh5#
      • 1...Kxh6!
    • 1.Qd6?
      • threat
        • 2.Qf4#
      • 1...Kh4
        • 2.Qg3#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kg4!
    • 1.Qg6+?
      • 1...Kh4
        • 2.Rxh5#
        • 2.Qxh5#
        • 2.Qg3#
      • 1...Bxg6!
  • Keys
    • 1.Sh2!
      • 1...Kh4
        • 2.Qg4#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Bd1
        • 2.Qg6#
      • 1...Be2
        • 2.Qg6#
      • 1...Bf3
        • 2.Sxf3#
        • 2.Qg6#
      • 1...Bg4
        • 2.Qg6#
      • 1...Bg6
        • 2.Qxg6#
      • 1...Bf7
        • 2.Sf3#
      • 1...Be8
        • 2.Sf3#
      • 1...Sf8
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(b);N_GUARD::QAR1(C)
    • B(b);N_GUARD,SBLOCK::QAR1(C)
    • B(b);N_GUARD::QAR1(C),XB(b)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(C),XB(b)
        • K(a);OGATE,P_SPINB(b),S_FLIGHT::QAR1(C),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(C),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P_SPINB(b),S_FLIGHT::QAB1(C)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • B(b);XQ(C)
  • Actual
    • S(A);
    • Vars
      • K(a);P_SPINB(b),S_FLIGHT::QAR1(C)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • B(b);N_GUARD::QAR1(C)
      • B(b);N_GUARD::QAR1(C),XB(b)
      • B(b);N_GUARD::S(A)
      • S(c);N_GUARD::QAB1(C)
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