MESON Chess Problem Database

Problem Display
PID: 172210 (8/1Q6/8/8/5K2/8/1P1kp3/2RB4 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/1Q6/8/8/5K2/8/1P1kp3/2RB4

#2

5 + 2

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qd5#
      • 2.Qd7#
  • Tries
    • 1.Qg2?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kd3
        • 2.Qd5#
      • 1...Kxc1!
    • 1.Qf3?
      • threat
        • 2.Qc3#
      • 1...Ke1
        • 2.Qxe2#
      • 1...exd1Q
        • 2.Qxd1#
        • 2.Qe3#
      • 1...exd1S
        • 2.Qxd1#
      • 1...exd1B
        • 2.Qxd1#
        • 2.Qe3#
      • 1...exd1R
        • 2.Qxd1#
        • 2.Qe3#
      • 1...Kxc1!
    • 1.Qb3?
      • threat
        • 2.Qc3#
      • 1...Kxc1
        • 2.Qc2#
      • 1...exd1Q
        • 2.Qxd1#
        • 2.Qe3#
      • 1...exd1S
        • 2.Qxd1#
      • 1...exd1B
        • 2.Qxd1#
        • 2.Qe3#
      • 1...exd1R
        • 2.Qxd1#
        • 2.Qe3#
      • 1...Ke1!
    • 1.Qb4+?
      • 1...Kd3
        • 2.Bc2#
        • 2.Qc3#
        • 2.Qd6#
      • 1...Kxc1!
  • Keys
    • 1.Qe4!
      • 1...Kxc1
        • 2.Qc2#
      • 1...Ke1
        • 2.Qxe2#
      • 1...exd1Q
        • 2.Qe3#
      • 1...exd1S
        • 2.Rc2#
      • 1...exd1B
        • 2.Qe3#
      • 1...exd1R
        • 2.Rc2#
        • 2.Qe3#
      • 1...e1Q
        • 2.Qc2#
      • 1...e1S
        • 2.Qe3#
      • 1...e1B
        • 2.Qc2#
        • 2.Qe3#
      • 1...e1R
        • 2.Qc2#

Anticipated by 220504(1928)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XR(A)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E),XP(b)
        • P(b);OGATE,XB(B)::QAR1(E),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT,XR(A)::QAR1(E)
        • P(b);OGATE,XB(B)::QAR1(E),XS(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(A)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT,XR(A)::QAR1(E)
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
      • P(b);XB(B)::QAB1(E)
      • P(b);SBLOCK,XB(B)::R1(A)
      • P(b);SBLOCK::QAR1(E)
      • P(b);::QAB1(E)
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