MESON Chess Problem Database

Problem Display
PID: 110160 (1BB5/rP1p3K/p3p3/N2kP3/1p1p1R2/1p1N4/2Pp1b2/2Qb3n w - - 0 1)

Labai, Zoltan

3rd Comm., Sachove umeni (Ceskoslovensky sach), 1973

1BB5/rP1p3K/p3p3/N2kP3/1p1p1R2/1p1N4/2Pp1b2/2Qb3n

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb7
      • 2.Bxb7#
    • 1...Ra8
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Bxc2
      • 2.Qxh1#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qxb3#
      • 1...bxc2
        • 2.Qb3#
      • 1...Bxc2!
    • 1.Qb1?
      • threat
        • 2.Qxb3#
      • 1...Bxc2
        • 2.Qxh1#
      • 1...bxc2
        • 2.Qb3#
      • 1...b2!
    • 1.Qxd1?
      • threat
        • 2.Qf3#
        • 2.Qxh1#
      • 1...Be1
        • 2.Qf3#
      • 1...Bg1
        • 2.Qf3#
      • 1...Sg3!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Sxb4#
      • 1...Rxb7
        • 2.Bxb7#
      • 1...Bxc2
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(k);OGATE,XP(G)::B(J),XR(k)
    • R(k);OGATE::PXR(k)=Q
    • B(a);OGATE,P_PINS(C),XP(B)::QAB(A),XS(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(e)
      • Vars
        • P(e);XP(B)::QAB(A)
      • Refutation
        • B(a);P_PINS(C),XP(B)
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(e)
      • Vars
        • B(a);OGATE,P_PINS(C),XP(B)::QAB(A),XS(b)
        • P(e);XP(B)::QAB(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::QAB(A)
      • Refutation
        • S(b);
  • Actual
    • B(I);
    • Threat
      • S(C),XP(f)
    • Vars
      • R(k);OGATE,XP(G)::B(J),XR(k)
      • B(a);OGATE,P_PINS(C),XP(B)::QAB(A),XS(b)
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