MESON Chess Problem Database

Problem Display
PID: 93733 (5K2/b7/n2PpB2/3P4/2B1k1P1/3r4/2NPN1P1/1Q6 w - - 0 1)

Brabec, Juraj

Sachove umeni (Ceskoslovensky sach), 1963

5K2/b7/n2PpB2/3P4/2B1k1P1/3r4/2NPN1P1/1Q6

#2

11 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Sxa3#
    • 1...Re3
      • 2.Sxe3#
    • 1...Rf3
      • 2.Se3#
    • 1...Rg3
      • 2.Se3#
    • 1...Rh3
      • 2.Se3#
    • 1...Rd4
      • 2.Scxd4#
    • 1...Rxd5
      • 2.Scd4#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qf4#
      • 1...Rf3
        • 2.Qxf3#
        • 2.gxf3#
      • 1...Be3
        • 2.Sg3#
        • 2.Qf3#
      • 1...e5
        • 2.Qf5#
      • 1...Bf2!
    • 1.Qb7?
      • threat
        • 2.Qh7#
      • 1...Rxd5
        • 2.d3#
      • 1...Rf3
        • 2.dxe6#
      • 1...Rh3
        • 2.dxe6#
      • 1...Sc7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh7#
      • 1...Rxd5
        • 2.g3#
      • 1...Rf3
        • 2.gxf3#
      • 1...Rh3
        • 2.gxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(a);::QAB(A)+S(B),XR(a)
    • R(a);P_PINB(J)::QAB(A)+S(B)
    • R(a);::QAB(A)+S(B)
    • R(a);XP(H)::QAB(A)+S(B)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(d);N_GUARD::QAB1(A)
      • Refutation
        • B(e);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(H)::P(C)
        • R(a);N_GUARD,P_PINB(J)::QAB(A)+P(H),XP(d)
        • R(a);N_GUARD::QAB(A)+P(H),XP(d)
      • Refutation
        • S(c);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(a);N_GUARD,XP(H)::QAB(A)+P(E)
      • R(a);OGATE,P_PINB(J)::P(E),XR(a)
      • R(a);OGATE::QAB(A)+P(E),XR(a)
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