MESON Chess Problem Database

Problem Display
PID: 32855 (8/5K2/8/8/8/5R1N/4N2p/4qB1k w - - 0 1)

Gavrilov, G

De Problemist, 1929

8/5K2/8/8/8/5R1N/4N2p/4qB1k

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sg3#
      • 2.Sf2#
    • 1...Qf2
      • 2.Sxf2#
    • 1...Qc3
      • 2.Sg3#
      • 2.Sf2#
    • 1...Qg3
      • 2.Sxg3#
    • 1...Qb4
      • 2.Sg3#
      • 2.Sf2#
    • 1...Qa5
      • 2.Sg3#
      • 2.Sf2#
    • 1...Qa1
      • 2.Sg3#
      • 2.Sf2#
    • 1...Qb1
      • 2.Sg3#
      • 2.Sf2#
    • 1...Qc1
      • 2.Sg3#
      • 2.Sf2#
    • 1...Qd1
      • 2.Sg3#
      • 2.Sf2#
  • Keys
    • 1.Rf2!
      • threat
        • 2.Sg3#
        • 2.Bg2#
      • 1...Qxf2+
        • 2.Sxf2#
      • 1...Qxf1
        • 2.Sg3#
      • 1...Qxe2
        • 2.Bg2#
      • 1...Qc3
        • 2.Bg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD,P_PINR(C)::S(D),XQ(a)
    • Q(a);N_GUARD::S(B),XQ(a)
  • Actual
    • R(C);
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);CHECK,XR(C)::S(D),XQ(a)
      • Q(a);P_PINR(C),XB(A)::S(B)
      • Q(a);XS(B)::B(A)
      • Q(a);::B(A)
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