MESON Chess Problem Database

Problem Display
PID: 172235 (7B/8/2Q5/8/8/p7/1pR1K3/1k6 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

7B/8/2Q5/8/8/p7/1pR1K3/1k6

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rxb2+?
      • 1...Ka1
        • 2.Qh1#
        • 2.Qc1#
      • 1...axb2!
    • 1.Qh1+?
      • 1...Kxc2
        • 2.Qd1#
      • 1...Ka2!
    • 1.Qc4?
      • 1...Ka1
        • 2.Rc1#
      • 1...a2!
  • Keys
    • 1.Qd5!
      • 1...Ka1
        • 2.Rc1#
      • 1...Kxc2
        • 2.Qd1#
      • 1...a2
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK,XP(b)
      • Refutation
        • P(c);XR(A)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(A)::QAB1(C)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::R(A)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::R(A)
      • K(a);S_FLIGHT,XR(A)::QAB1(C)
      • P(c);SBLOCK::QAR2(C)
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