MESON Chess Problem Database

Problem Display
PID: 103947 (B1R2R2/2p5/Q2P4/4KN2/7B/7P/P3P3/5kN1 w - - 0 1)

Janet, Frank

St. Louis Globe Democrat, 1915

B1R2R2/2p5/Q2P4/4KN2/7B/7P/P3P3/5kN1

#2

12 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rg8?
      • threat
        • 2.Se3#
        • 2.e3#
        • 2.e4#
      • 1...c5
        • 2.Se3#
      • 1...cxd6+!
    • 1.Qc6?
      • threat
        • 2.Qg2#
        • 2.Qc1#
      • 1...Kxg1
        • 2.Qh1#
        • 2.Qg2#
      • 1...cxd6+!
    • 1.Qa7?
      • threat
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Qf2#
      • 1...cxd6+
        • 2.Sxd6#
      • 1...c6
        • 2.Qf2#
      • 1...c5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Qf2#
        • 2.Qb1#
      • 1...cxd6+
        • 2.Sxd6#
      • 1...cxb6
        • 2.Rc1#
      • 1...c5
        • 2.Qb1#
      • 1...c6
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(L);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::S(G)
      • Refutation
        • P(b);CHECK,XP(I)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);CHECK,XP(I)
    • Try
      • Q(H);
      • Threat
        • DUALS(4)
      • Vars
        • P(b);CHECK,XP(I)::R(L)+S(G),XP(b)
        • P(b);::QAR1(H)
      • Refutation
        • P(b);
  • Actual
    • Q(H);
    • Threat
      • DUALS(5)
    • Vars
      • P(b);CHECK,XP(I)::R(L)+S(G),XP(b)
      • P(b);OGATE,XQ(H)::R(K)
      • P(b);::QAR(H)
      • P(b);::QAR1(H)
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