MESON Chess Problem Database

Problem Display
PID: 172277 (8/1Q6/8/1p6/rR6/k7/2K5/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/1Q6/8/1p6/rR6/k7/2K5/8

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rxa4+?
      • 1...bxa4
        • 2.Qb2#
      • 1...Kxa4!
    • 1.Qf3+?
      • 1...Kxb4
        • 2.Qc3#
      • 1...Ka2!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qb2#
      • 1...Ka2
        • 2.Qb2#
      • 1...Kxb4
        • 2.Qc3#
      • 1...Rxb4
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK,XR(b)
      • Vars
        • P(c);OGATE,SBLOCK,XR(B)::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);S_FLIGHT,XR(B)::QAB1(C)
      • R(b);SBLOCK,XR(B)::QAR2(C)
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