MESON Chess Problem Database

Problem Display
PID: 172358 (8/8/8/K7/8/k2B4/1R6/1qB1N3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1997

8/8/8/K7/8/k2B4/1R6/1qB1N3

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sc2#
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qa1
      • 2.Sc2#
  • Tries
    • 1.Ra2+?
      • 1...Kb3
        • 2.Ra3#
      • 1...Kxa2!
    • 1.Rb3+?
      • 1...Ka2
        • 2.Ra3#
      • 1...Kxb3!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Rxb1#
        • 2.Ra2#
      • 1...Qf5+
        • 2.Rb5#
      • 1...Qxc1
        • 2.Ra2#
      • 1...Qxb2
        • 2.Sc2#
      • 1...Qa2
        • 2.Sc2#
        • 2.Rxa2#
        • 2.Rb3#
      • 1...Qc2
        • 2.Sxc2#
        • 2.Ra2#
        • 2.Rxc2#
      • 1...Qd3
        • 2.Rb1#
        • 2.Ra2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Qe4
        • 2.Rb1#
        • 2.Ra2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Qg6
        • 2.Rb1#
        • 2.Ra2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Qh7
        • 2.Rb1#
        • 2.Ra2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Qa1
        • 2.Sc2#
        • 2.Ra2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::S(B)
    • Q(a);N_GUARD::S(B),XQ(a)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(C)
      • Refutation
        • K(b);P-FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(C)
      • Refutation
        • K(b);P-FLIGHT,XR(C)
  • Actual
    • B(D);
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);CHECK,N_GUARD::B(A)+R(C)
      • Q(a);XB(A)::R1(C)
      • Q(a);N_GUARD,P_SPINQ(a),XR(C)::S(B)
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