MESON Chess Problem Database

Problem Display
PID: 172493 (5R2/8/8/8/6Kb/6p1/7k/4Q3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2001

5R2/8/8/8/6Kb/6p1/7k/4Q3

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rh8?
      • 1...g2
        • 2.Rxh4#
      • 1...Kg2!
    • 1.Qxg3+?
      • 1...Kh1
        • 2.Rf1#
      • 1...Bxg3!
    • 1.Qe2+?
      • 1...Kg1
        • 2.Rf1#
      • 1...Kh1
        • 2.Rf1#
      • 1...g2!
  • Keys
    • 1.Rf1!
      • 1...Kg2
        • 2.Qe2#
      • 1...Bg5
        • 2.Qxg3#
      • 1...Bf6
        • 2.Qxg3#
      • 1...Be7
        • 2.Qxg3#
      • 1...Bd8
        • 2.Qxg3#
      • 1...g2
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);P_PINB(c)
      • Vars
        • P(b);SBLOCK::R(C),XB(c)
      • Refutation
        • K(a);N_SPINB(c),P-FLIGHT
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • B(c);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(C)
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • R(C);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • B(c);N_GUARD::QAB1(A),XP(b)
      • P(b);OGATE,SBLOCK::QAR2(A),XB(c)
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