MESON Chess Problem Database

Problem Display
PID: 164653 (8/8/7B/3N3K/8/2p5/Q2p4/2k5 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/8/7B/3N3K/8/2p5/Q2p4/2k5

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qa1#
  • Tries
    • 1.Kg4?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Kh4?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Kg6?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Se3?
      • threat
        • 2.Qa1#
        • 2.Qc2#
      • 1...d1B+
        • 2.Sg4#
      • 1...d1S
        • 2.Qc2#
      • 1...d1R
        • 2.Qc2#
      • 1...c2
        • 2.Qa1#
        • 2.Qxc2#
      • 1...d1Q+!
    • 1.Sb4?
      • threat
        • 2.Qa1#
        • 2.Qc2#
      • 1...c2
        • 2.Qa1#
        • 2.Qxc2#
      • 1...Kd1!
    • 1.Sb6?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Sf6?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Sc7?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Se7?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Bxd2+?
      • 1...Kd1
        • 2.Sxc3#
      • 1...cxd2!
    • 1.Be3?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Bf4?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
    • 1.Bg5?
      • 1...c2
        • 2.Qa1#
      • 1...Kd1!
  • Keys
    • 1.Sf4!
      • 1...d1Q+
        • 2.Se2#
      • 1...d1B+
        • 2.Se2#
      • 1...Kd1
        • 2.Qb1#
      • 1...d1S
        • 2.Se2#
        • 2.Sd3#
      • 1...d1R
        • 2.Se2#
        • 2.Sd3#
      • 1...c2
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR2(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(B);N_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK,SBLOCK::B(D)+S(B)
        • P(b);::QAR1(A)
      • Refutation
        • P(b);CHECK
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(B);
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(B);
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(B);
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(B);
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(D);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::S(B),XP(c)
      • Refutation
        • P(c);XB(D)
    • Try
      • B(D);
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(D);
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • B(D);
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • S(B);N_PINP(b)
    • Vars
      • P(b);CHECK,SBLOCK::B(D)+S(B),DCHECK
      • K(a);P-FLIGHT::QAR2(A)
      • P(c);SBLOCK::QAR2(A)
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