MESON Chess Problem Database

Problem Display
PID: 106893 (8/1q3rp1/8/7Q/RN1NBk2/2B1p1p1/r1b5/n5K1 w - - 0 1)

Colonelli, Hercules

Guarantigueta Club Ty., 1959

8/1q3rp1/8/7Q/RN1NBk2/2B1p1p1/r1b5/n5K1

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Se2#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rc7
      • 2.Qf5#
    • 1...Rd7
      • 2.Qf5#
    • 1...Re7
      • 2.Qf5#
    • 1...Bxe4
      • 2.Se6#
  • Tries
    • 1.Sd3+?
      • 1...Bxd3
        • 2.Se6#
      • 1...Kxe4!
    • 1.Sd5+?
      • 1...Qxd5
        • 2.Se2#
      • 1...Kxe4!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Sb5#
      • 1...Kxg4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qh4#
      • 1...Kxe4
        • 2.Qg4#
      • 1...Qxe4
        • 2.Sd5#
      • 1...Bxe4
        • 2.Sd3#
      • 1...Qe7
        • 2.Sd5#
      • 1...Bd1
        • 2.Sd3#
      • 1...g5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(g);SBLOCK,XB(F)::S(E)
    • R(h);N_GUARD::QAR1(G),XR(h)
    • R(h);N_GUARD::QAR1(G)
    • B(c);SBLOCK,XB(F)::S(E)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • B(c);XS(D)::S(E)
      • Refutation
        • K(f);P-FLIGHT,XB(F)
    • Try
      • S(D);CHECK
      • Vars
        • Q(g);XS(D)::S(E)
      • Refutation
        • K(f);P-FLIGHT,XB(F)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);S_FLIGHT::B(B)+S(E)
      • Refutation
        • K(f);P-FLIGHT,XQ(G)
  • Actual
    • S(E);
    • Threat
      • QAR2(G)
    • Vars
      • K(f);P-FLIGHT,XB(F)::QAR2(G)
      • Q(g);N_GUARD,XB(F)::S(D)
      • B(c);N_GUARD,XB(F)::S(D)
      • Q(g);N_GUARD::S(D)
      • B(c);N_GUARD::S(D)
      • P(i);SBLOCK::QAR1(G)
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