MESON Chess Problem Database

Problem Display
PID: 107795 (Q2r3q/8/2P4b/1R1PP3/1P2k2N/3N2P1/2B4K/3b2B1 w - - 0 1)

Brabec, Juraj

Sachove umeni (Ceskoslovensky sach), 1973

Q2r3q/8/2P4b/1R1PP3/1P2k2N/3N2P1/2B4K/3b2B1

#2

12 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qc4#
      • 1...Qxe5
        • 2.Sc5#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Be3!
    • 1.Qa7?
      • threat
        • 2.Qd4#
      • 1...Qxe5
        • 2.Sf2#
      • 1...Be3
        • 2.Qxe3#
      • 1...Rxd5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qd4#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Rxd5
        • 2.Sc5#
      • 1...Be3
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(L);
      • Threat
        • QAR2(L)
      • Vars
        • Q(e);P_PINP(E),SBLOCK,XP(J)::B(B)+S(D),DCHECK
        • R(d);OGATE,XP(I)::QAB1(L),XR(d)
      • Refutation
        • B(c);P_PINS(G)
    • Try
      • Q(L);
      • Threat
        • QAR1(L)
      • Vars
        • Q(e);P_PINP(E),SBLOCK,XP(J)::B(B)+S(D),DCHECK
        • B(c);N_GUARD,P_PINS(G)::QAR1(L),XB(c)
      • Refutation
        • R(d);XP(I)
  • Actual
    • Q(L);
    • Threat
      • QAR1(L)
    • Vars
      • Q(e);OGATE,P_PINP(E),XP(J)::QAR1(L),XQ(e)
      • R(d);SBLOCK,XP(I)::B(B)+S(D),DCHECK
      • B(c);P_PINS(G),SBLOCK::B(B)+S(D),DCHECK
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