MESON Chess Problem Database

Problem Display
PID: 103257 (4r3/7P/5PR1/8/RBQ1n2k/4K3/5P2/3B4 w - - 0 1)

Tomasevic, Milos

Vecherni Novosti, 1979

4r3/7P/5PR1/8/RBQ1n2k/4K3/5P2/3B4

#2

9 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.h8Q#
      • 2.h8R#
  • Tries
    • 1.Ra5?
      • threat
        • 2.Rh5#
        • 2.Rh6#
      • 1...Kh3
        • 2.Rh5#
      • 1...Re5!
    • 1.Qxe4+?
      • 1...Kh3
        • 2.Rh6#
      • 1...Rxe4+!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qg4#
      • 1...Rxe6
        • 2.h8Q#
        • 2.h8R#
      • 1...Sxf2
        • 2.Be1#
      • 1...Sxf6
        • 2.Be7#
      • 1...Sd2
        • 2.Bxd2#
      • 1...Sc3
        • 2.Bxc3#
      • 1...Sg3
        • 2.fxg3#
      • 1...Sc5
        • 2.Bxc5#
      • 1...Sg5
        • 2.Rh6#
      • 1...Sd6
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::P=Q
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINS(a),P-FLIGHT::R(D)
      • Refutation
        • R(c);
    • Try
      • Q(F);CHECK,P_SPINQ(F),XS(a)
      • Vars
        • K(b);P-FLIGHT::R(H)
      • Refutation
        • R(c);CHECK,XQ(F)
  • Actual
    • Q(F);N_PINS(a)
    • Threat
      • QAR1(F)
    • Vars
      • R(c);N_GUARD,XQ(F)::P=Q
      • S(a);OGATEB,P_PINQ(F),XP(B)::R(D)+B(E)
      • S(a);OGATEB,P_PINQ(F),XP(G)::R(D)+B(E)
      • S(a);OGATEB,P_PINQ(F)::R(D)+B(E),XS(a)
      • S(a);OGATE,P_PINQ(F)::P(B),XS(a)
      • S(a);P_PINQ(F),SBLOCK::R(H)
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