MESON Chess Problem Database

Problem Display
PID: 106974 (rb1N4/2P2p2/qPR2B2/1p1k1p2/2pp4/5P2/P1PP1K2/1Q6 w - - 0 1)

Colonelli, Hercules

Sinfonie Scacchistiche 05. TT, 1969

rb1N4/2P2p2/qPR2B2/1p1k1p2/2pp4/5P2/P1PP1K2/1Q6

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxb5#
    • 1...Qc8
      • 2.Qxb5#
    • 1...Qxa2
      • 2.Qxb5#
    • 1...Qa7
      • 2.Qxb5#
    • 1...c3
      • 2.Qb3#
  • Tries
    • 1.Qh1?
      • threat
        • 2.f4#
      • 1...f4
        • 2.Qh5#
      • 1...Qa3!
    • 1.Qb2?
      • threat
        • 2.Qxd4#
      • 1...c3
        • 2.Qb3#
      • 1...d3
        • 2.Qd4#
        • 2.Qe5#
      • 1...Qxb6!
    • 1.cxb8Q?
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...Qa3
        • 2.Qe5#
      • 1...Rxb8!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Rd6#
        • 2.Qc5#
        • 2.Qd6#
      • 1...Qxb6
        • 2.Qd6#
      • 1...Bxc7
        • 2.Qc5#
      • 1...Qa3
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD::QAR2(A),XP(c)
    • Q(f);N_GUARD,XP(B)::QAR2(A),XP(c)
    • P(a);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)+P(F)
      • Vars
        • P(e);OGATEB::QAR(A)
      • Refutation
        • Q(f);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • P(a);OGATEB::QAB(A)
      • Refutation
        • Q(f);XP(G)
    • Try
      • P(J);XB(i)
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);::QAR1(J)
      • Refutation
        • R(h);XQ(J)
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • Q(f);XP(G)::QAR1(A)
      • B(i);XP(J)::QAR1(A)
      • Q(f);::R1(H)
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