MESON Chess Problem Database

Problem Display
PID: 172403 (8/8/8/8/8/3Q4/2R3pk/KN5b w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

8/8/8/8/8/3Q4/2R3pk/KN5b

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rc3?
      • 1...g1Q
        • 2.Qh3#
      • 1...g1S
        • 2.Qg3#
      • 1...g1B
        • 2.Qg3#
        • 2.Qh3#
      • 1...g1R
        • 2.Qh3#
      • 1...Kg1!
    • 1.Qg3+?
      • 1...Kg1
        • 2.Rc1#
      • 1...Kxg3!
  • Keys
    • 1.Sd2!
      • 1...g1Q+
        • 2.Sf1#
      • 1...g1R+
        • 2.Sf1#
      • 1...Kg1
        • 2.Sf3#
      • 1...g1S
        • 2.Sf1#
      • 1...g1B
        • 2.Sf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);N_PINP(b)
      • Vars
        • P(b);P_PINS(B),SBLOCK::QAR1(D)
        • P(b);::QAB1(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);S_FLIGHT::R(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XQ(D)
  • Actual
    • S(B);N_PINP(b)
    • Vars
      • P(b);CHECK,SBLOCK::R(C)+S(B),DCHECK
      • K(c);S_FLIGHT::S(B)
      • P(b);SBLOCK::R(C)+S(B),DCHECK
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