MESON Chess Problem Database

Problem Display
PID: 104679 (5Q2/Npp1q3/4p3/rp4b1/1PNk1P2/1P3B2/3K4/8 w - - 0 1)

Juricek, Jan

Canadian Chess Chat, 1980

5Q2/Npp1q3/4p3/rp4b1/1PNk1P2/1P3B2/3K4/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qf6
      • 2.Qc5#
    • 1...Qd8
      • 2.Qc5#
    • 1...Qd7
      • 2.Qc5#
    • 1...Qf7
      • 2.Qc5#
    • 1...Qg7
      • 2.Qc5#
    • 1...Qh7
      • 2.Qc5#
    • 1...Qe8
      • 2.Qc5#
    • 1...Ra1
      • 2.Sxb5#
    • 1...Ra3
      • 2.Sxb5#
    • 1...Ra4
      • 2.Sxb5#
    • 1...Ra6
      • 2.Sxb5#
    • 1...Bxf4+
      • 2.Qxf4#
    • 1...b6
      • 2.Sc6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sc2#
      • 1...Qxb4+
        • 2.Qxb4#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qh7
        • 2.Qc5#
      • 1...Ra2+!
    • 1.Sxa5?
      • threat
        • 2.Sxb5#
      • 1...Qxb4+
        • 2.Qxb4#
      • 1...Bxf4+
        • 2.Qxf4#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qd7
        • 2.Qc5#
      • 1...Qe8
        • 2.Qc5#
      • 1...c6!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Sc2#
      • 1...Qxb4+
        • 2.Qxb4#
      • 1...Bxf4+
        • 2.Qxf4#
      • 1...Rxa3
        • 2.Sxb5#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qh7
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(h);OGATE::QAB1(H),XQ(h)
    • Q(h);OGATE::QAB1(H)
    • R(b);N_GUARD::S(G),XP(c)
    • B(d);CHECK,OGATE,XP(F)::QAR2(H),XB(d)
    • P(f);N_GUARD::S(G)
  • Tries
    • Try
      • S(E);N_SPINP(F)
      • Threat
        • S(E)
      • Vars
        • Q(h);CHECK,OGATE,XP(D)::QAR2(H),XQ(h)
        • B(d);OGATE,P_PINS(E),XP(F)::QAR2(H),XB(d)
        • Q(h);OGATE::QAB1(H),XQ(h)
        • Q(h);OGATE::QAB1(H)
      • Refutation
        • R(b);CHECK
    • Try
      • S(E);XR(b)
      • Threat
        • S(G),XP(c)
      • Vars
        • Q(h);CHECK,OGATE,XP(D)::QAR2(H),XQ(h)
        • B(d);CHECK,OGATE,XP(F)::QAR2(H),XB(d)
        • Q(h);OGATE::QAB1(H),XQ(h)
        • Q(h);OGATE::QAB1(H)
      • Refutation
        • P(g);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • Q(h);CHECK,OGATE,XP(D)::QAR2(H),XQ(h)
      • B(d);CHECK,OGATE,XP(F)::QAR2(H),XB(d)
      • R(b);N_GUARD,XS(E)::S(G),XP(c)
      • Q(h);OGATE::QAB1(H),XQ(h)
      • Q(h);OGATE::QAB1(H)
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