MESON Chess Problem Database

Problem Display
PID: 107646 (4R2Q/K2N2NB/3p4/3p4/2Pk1pn1/6p1/1P3bp1/2R1n3 w - - 0 1)

Bakcsi, Gyorgy

Shakhmatna misl, 1980

4R2Q/K2N2NB/3p4/3p4/2Pk1pn1/6p1/1P3bp1/2R1n3

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Se6#
    • 1...Sd3
      • 2.Sf5#
    • 1...Sh2
      • 2.Sh5#
    • 1...Se3
      • 2.Sh5#
      • 2.Se6#
    • 1...Sh6
      • 2.Sh5#
  • Tries
    • 1.Sh5+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Se5!
    • 1.Rc3?
      • threat
        • 2.Sf5#
        • 2.Se6#
      • 1...Sd3
        • 2.Sf5#
      • 1...Se5
        • 2.Se6#
      • 1...dxc4!
    • 1.Rexe1?
      • threat
        • 2.Se6#
      • 1...dxc4
        • 2.Rcd1#
      • 1...Bxe1!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxf4#
      • 1...dxc4
        • 2.Qxd6#
      • 1...Be3
        • 2.Se6#
      • 1...Sd3
        • 2.Sf5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...f3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(b);SBLOCK::QAB(I)+S(F),DCHECK
    • S(a);SBLOCK::QAB(I)+S(F),DCHECK
    • S(g);N_GUARD::QAB(I)+S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB(I),XS(g)
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB(I)+S(F),DCHECK
        • S(g);::S(F)
      • Refutation
        • P(h);XP(C)
    • Try
      • R(H);XS(a)
      • Threat
        • QAB(I)+S(F),DCHECK
      • Vars
        • P(h);SBLOCK,XP(C)::R(A)
      • Refutation
        • B(b);XR(H)
  • Actual
    • Q(I);
    • Threat
      • QAR2(I),XP(f)
    • Vars
      • P(h);OGATEB,XP(C)::QAR2(I),XP(i)
      • B(b);SBLOCK::S(F)
      • S(a);SBLOCK::S(F)
      • S(g);N_GUARD::QAB(I),XS(g)
      • P(f);::QAR2(I)
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