MESON Chess Problem Database

Problem Display
PID: 172220 (8/8/8/8/p1K5/8/nk2P3/3R1Q2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/8/8/8/p1K5/8/nk2P3/3R1Q2

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...a3
      • 2.Rd2#
  • Tries
    • 1.Rb1+?
      • 1...Kc2
        • 2.Qd1#
      • 1...Ka3!
  • Keys
    • 1.Ra1!
      • 1...Kc2
        • 2.Rxa2#
      • 1...Ka3
        • 2.Qc1#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sc3
        • 2.Qc1#
      • 1...Sb4
        • 2.Qb1#
        • 2.Qc1#
      • 1...a3
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R(A)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(b);P-FLIGHT::R(A),XS(a)
      • K(b);P_SPINS(a),S_FLIGHT::QAB(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB1(B)
      • P(c);SBLOCK::QAR1(B)
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