MESON Chess Problem Database

Problem Display
PID: 106229 (5K2/Npp2n2/2Bk1B2/4R3/5p2/1q1p4/8/5Q2 w - - 0 1)

Garaj, Ivan

Labai, Zoltan

Praca, 1998

5K2/Npp2n2/2Bk1B2/4R3/5p2/1q1p4/8/5Q2

#2

6 + 7

6490 yacpdb 2009
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qxd3+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qxd3!
    • 1.Qe1?
      • threat
        • 2.Be7#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Qe6
        • 2.Qb4#
      • 1...bxc6!
    • 1.Qf3?
      • threat
        • 2.Sc8#
      • 1...bxc6
        • 2.Qxc6#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qe6
        • 2.Sb5#
      • 1...Sxe5!
    • 1.Qxf4?
      • threat
        • 2.Be7#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Qe6
        • 2.Rd5#
        • 2.Qb4#
      • 1...bxc6!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qd7#
      • 1...Sxe5
        • 2.Be7#
      • 1...bxc6
        • 2.Sc8#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qe6
        • 2.Qxe6#

Anticipated by 36952(1985)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(A),XQ(a)
      • Refutation
        • Q(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • B(D)
      • Vars
        • S(g);OGATE,XR(B)::QAB1(A),XS(g)
        • Q(a);N_GUARD::QAB(A)
      • Refutation
        • P(e);XB(C)
    • Try
      • Q(A);
      • Threat
        • S(E)
      • Vars
        • P(e);OGATE,XB(C)::QAR1(A),XP(e)
        • Q(a);N_GUARD::QAR1(A),XQ(a)
        • Q(a);N_GUARD::S(E)
      • Refutation
        • S(g);XR(B)
    • Try
      • Q(A);XP(c)
      • Threat
        • B(D)
      • Vars
        • S(g);OGATE,P_SPINS(g),XR(B)::QAB1(A),XS(g)
      • Refutation
        • P(e);XB(C)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(g);SBLOCK,XR(B)::B(D)
      • P(e);SBLOCK,XB(C)::S(E)
      • Q(a);N_GUARD::R1(B),XQ(a)
      • Q(a);N_GUARD::QAR1(A),XQ(a)
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