MESON Chess Problem Database

Problem Display
PID: 95078 (Q7/1p4pB/3pr1N1/1PPP4/2r1k1P1/2pNP3/4K3/8 w - - 0 1)

Brabec, Juraj

Pravda, 1966

Q7/1p4pB/3pr1N1/1PPP4/2r1k1P1/2pNP3/4K3/8

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qxb7#
    • 1...b6
      • 2.Sf2#
  • Tries
    • 1.Sgf4+?
      • 1...Rg6
        • 2.Bxg6#
        • 2.Qe8#
      • 1...g6!
    • 1.Se7+?
      • 1...Rg6
        • 2.Bxg6#
      • 1...g6!
    • 1.Qxb7?
      • threat
        • 2.Sf2#
      • 1...Rxg6
        • 2.Bxg6#
      • 1...Rf6!
    • 1.Qg8?
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Se7#
      • 1...Rxg6
        • 2.Bxg6#
        • 2.Qe6#
      • 1...Re5
        • 2.Sf2#
      • 1...Re7
        • 2.Sf2#
      • 1...Re8
        • 2.Sf2#
      • 1...Rf6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qxc4#
      • 1...Kxd5
        • 2.Sgf4#
      • 1...Rxc5
        • 2.Sf2#
      • 1...Ra4
        • 2.Sf2#
      • 1...Rb4
        • 2.Sf2#
      • 1...Rd4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P_PINP(C),P_SPINP(f),S_FLIGHT,XP(G)::QAB(J),XP(f)
    • P(f);::S(B)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(H);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::B(I),XR(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(J);XP(f)
      • Threat
        • S(B)
      • Vars
        • R(e);OGATE,P_SPINR(e),XS(H)::B(I),XR(e)
      • Refutation
        • R(e);
    • Try
      • Q(J);
      • Threat
        • QAR2(J),XR(e)
      • Vars
        • K(c);P_PINP(C),P_SPINR(e),S_FLIGHT,XP(G)::S(H)
        • R(e);::S(B)
      • Refutation
        • R(e);
  • Actual
    • Q(J);
    • Threat
      • QAR2(J),XR(b)
    • Vars
      • K(c);P_PINP(C),P_SPINR(b),S_FLIGHT,XP(G)::S(H)
      • R(b);XP(F)::S(B)
      • R(b);::S(B)
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