MESON Chess Problem Database

Problem Display
PID: 107801 (BQ1R2q1/6p1/1B3p2/K2PN2r/3Nk1P1/pR3pP1/2P5/3r4 w - - 0 1)

Brabec, Juraj

3rd Prize, Pituk-80 JT, 1984

BQ1R2q1/6p1/1B3p2/K2PN2r/3Nk1P1/pR3pP1/2P5/3r4

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5+
      • 2.Bxd5#
    • 1...Qe6
      • 2.dxe6#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sc3#
        • 2.Re3#
      • 1...Qxd5
        • 2.Re3#
      • 1...Rxd5
        • 2.Re3#
        • 2.Rb4#
      • 1...Re1
        • 2.Sc3#
        • 2.Rb4#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rd4!
    • 1.Sf7?
      • threat
        • 2.Qf4#
      • 1...Rxd5+
        • 2.Bxd5#
      • 1...Re5
        • 2.Sd6#
      • 1...g5
        • 2.d6#
      • 1...Rf5!
    • 1.d6+?
      • 1...Kxe5
        • 2.Re3#
        • 2.d7#
      • 1...Qd5+!
  • Keys
    • 1.Se6!
      • threat
        • 2.Re3#
      • 1...Rxd5+
        • 2.Bxd5#
      • 1...Re1
        • 2.Rb4#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(h);CHECK,OGATE,P_SPINQ(h),XP(G)::B(J),XQ(h)
    • Q(h);OGATE::B(J)+P(G),XQ(h)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);P_PINS(D),P_SPINQ(h),XP(G)::R1(B)
        • R(a);OGATE::P(A),XR(a)
      • Refutation
        • R(a);
    • Try
      • S(H);P_SPINP(G)
      • Threat
        • QAR1(K)
      • Vars
        • R(e);CHECK,OGATE,P_SPINR(e),XP(G)::B(J),XR(e)
        • R(e);SBLOCK::S(H)
        • P(g);N_PINP(G)::B(J)+P(G)
      • Refutation
        • R(e);
    • Try
      • P(G);CHECK,P_SPINS(H)
      • Refutation
        • Q(h);CHECK,N_PINS(H),P_SPINQ(h)
  • Actual
    • S(D);
    • Threat
      • R1(B)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XP(G)::B(J),XR(a)
      • R(a);N_GUARD::R(B)
      • R(a);OGATE::P(A),XR(a)
      • R(a);SBLOCK::S(D)
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