MESON Chess Problem Database

Problem Display
PID: 99514 (3N4/2B5/2B4b/2k5/K3n3/2r1qN2/1PR2Q2/8 w - - 0 1)

Labai, Zoltan

Magyar Sakkszovetseg, 1974

3N4/2B5/2B4b/2k5/K3n3/2r1qN2/1PR2Q2/8

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Rc4+
      • 2.b4#
    • 1...Sg3
      • 2.Rxc3#
    • 1...Sg5
      • 2.Rxc3#
    • 1...Sf6
      • 2.Rxc3#
  • Tries
    • 1.Se6+?
      • 1...Kc4
        • 2.Se5#
      • 1...Kxc6!
    • 1.Qxe3+?
      • 1...Kc4
        • 2.Se5#
        • 2.Qd4#
        • 2.b3#
      • 1...Bxe3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Se6#
      • 1...Qd4+
        • 2.b4#
      • 1...Rc4+
        • 2.Rxc4#
      • 1...Kd4
        • 2.Se6#
      • 1...Sg5
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,OGATE::QAB1(C),XQ(b)
    • R(a);CHECK::P(A)
    • S(c);N_GUARD::R(B),XR(a)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(d);N_SPINQ(b),P-FLIGHT::S(D)
      • Refutation
        • K(d);N_SPINQ(b),P-FLIGHT,XB(F)
    • Try
      • Q(C);CHECK,XQ(b)
      • Refutation
        • B(e);XQ(C)
  • Actual
    • S(D);
    • Threat
      • S(H)
    • Vars
      • Q(b);CHECK::P(A)
      • R(a);CHECK,OGATE::R1(B),XR(a)
      • K(d);N_SPINR(a),S_FLIGHT::S(H)
      • S(c);S_CUTB(e)::QAB(C),XQ(b)
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