MESON Chess Problem Database

Problem Display
PID: 107674 (2R3b1/8/pB1P3R/P2k1p2/1qN2K2/2P1p2p/Q6n/1n6 w - - 0 1)

Bakcsi, Gyorgy

Telescacco 92, 1998

2R3b1/8/pB1P3R/P2k1p2/1qN2K2/2P1p2p/Q6n/1n6

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxa3#
      • 2.Sxe3#
    • 1...Qxc3
      • 2.Sxe3#
    • 1...Qxa5
      • 2.Sa3#
      • 2.Sxe3#
      • 2.Sxa5#
      • 2.Qxa5#
    • 1...Qc5
      • 2.Sxe3#
      • 2.Rxc5#
    • 1...Qxd6+
      • 2.Se5#
      • 2.Sxd6#
      • 2.Rxd6#
    • 1...Qb2
      • 2.Sxb2#
      • 2.Sxe3#
      • 2.Rc5#
    • 1...Qb3
      • 2.Sxe3#
      • 2.Rc5#
    • 1...Qa4
      • 2.Rc5#
    • 1...Qxc4+
      • 2.Qxc4#
    • 1...Qb5
      • 2.Sxe3#
    • 1...Qxb6
      • 2.Sxe3#
      • 2.Sxb6#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qd3#
      • 1...Qxd6+
        • 2.Rxd6#
      • 1...Qxc4+
        • 2.Qxc4#
      • 1...Qxb6
        • 2.Sxb6#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Qxc3!
    • 1.Qg2+?
      • 1...Sf3
        • 2.Qxf3#
        • 2.Qxg8#
      • 1...hxg2!
    • 1.cxb4?
      • threat
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sxe3#
        • 2.Se5#
      • 1...Sd2
        • 2.Sxd2#
        • 2.Sxe3#
      • 1...Sa3
        • 2.Sxa3#
        • 2.Sxe3#
      • 1...Sc3
        • 2.Sxe3#
      • 1...e2
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Se5#
      • 1...Be6!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc6#
      • 1...Qxd6+
        • 2.Rxd6#
      • 1...Qxc4+
        • 2.Qxc4#
      • 1...Qxa4
        • 2.Rc5#
      • 1...Qxb6
        • 2.Sxb6#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qb5
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(e);N_PINS(C),XP(B)::QAB(A)+S(C),DCHECK,XP(c)
    • Q(e);N_GUARD::R1(I)
    • Q(e);CHECK,OGATE,P_SPINQ(e),XS(C)::QAB1(A),XQ(e)
    • Q(e);N_PINS(C)::QAB(A)+S(C),DCHECK,XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • Q(e);CHECK,N_PINS(C),OGATE,XP(G)::R1(H),XQ(e)
        • Q(e);CHECK,OGATE,XS(C)::QAB1(A),XQ(e)
        • Q(e);N_PINS(C),XB(F)::S(C),XQ(e)
        • Q(e);N_GUARD,N_PINS(C)::R1(I),XQ(e)
        • S(b);N_GUARD::QAB(A),XS(b)
      • Refutation
        • Q(e);N_PINS(C),XP(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);XQ(A)
    • Try
      • P(B);N_SPINS(C),XQ(e)
      • Threat
        • DUALS(5)
      • Vars
        • S(a);::QAB(A)+S(C),DCHECK,XP(c)
      • Refutation
        • B(i);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(e);CHECK,N_PINS(C),OGATE,XP(G)::R1(H),XQ(e)
      • Q(e);CHECK,OGATE,XS(C)::QAB1(A),XQ(e)
      • Q(e);N_GUARD,XQ(A)::R1(I)
      • Q(e);N_PINS(C),XB(F)::S(C),XQ(e)
      • Q(e);N_GUARD,N_PINS(C)::R1(I),XQ(e)
      • Q(e);N_PINS(C)::S(C),XP(c)
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