MESON Chess Problem Database

Problem Display
PID: 18267 (7Q/8/7B/8/4k3/3pNpP1/1K3PP1/7n w - - 0 1)

Roosendaal, Jan C

Comm., Tijdschrift vd KNSB, 1954

7Q/8/7B/8/4k3/3pNpP1/1K3PP1/7n

#2

7 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qf4#
        • 2.gxf3#
      • 1...fxg2
        • 2.Qf4#
        • 2.f3#
      • 1...d2!
    • 1.Qa8+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke5!
    • 1.Qg8?
      • threat
        • 2.Qd5#
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke5!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Qh4#
        • 2.Qh7#
        • 2.Qa8#
        • 2.Qe8#
      • 1...Sxf2
        • 2.Qe8#
      • 1...Sxg3
        • 2.Qh4#
      • 1...fxg2
        • 2.Qa8#
      • 1...d2
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(G)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • K(d);P-FLIGHT::QAR1(G)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(F);
    • Threat
      • DUALS(4)
    • Vars
      • S(a);XP(B)::QAR(G)
      • S(a);XP(E)::QAR(G)
      • P(c);XP(C)::QAB(G)
      • P(b);::QAB(G)
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