MESON Chess Problem Database

Problem Display
PID: 99326 (3R1R1K/6N1/1N6/5Q1p/3pnp1r/4k1p1/bq2P1P1/4BB2 w - - 0 1)

Onkoud, Abdelaziz

Sakkelet, 1998

3R1R1K/6N1/1N6/5Q1p/3pnp1r/4k1p1/bq2P1P1/4BB2

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qxf4#
    • 1...Rh2
      • 2.Qxf4#
    • 1...Rh3
      • 2.Qxf4#
    • 1...Bb1
      • 2.Sc4#
      • 2.Sd5#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Sd2
      • 2.Qd3#
    • 1...Sc3
      • 2.Qd3#
    • 1...Sg5
      • 2.Qd3#
    • 1...Sd6
      • 2.Qd3#
    • 1...Sf6
      • 2.Qd3#
    • 1...d3
      • 2.Rxd3#
    • 1...f3
      • 2.Qxf3#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Sf5#
      • 1...Qxe2
        • 2.Qxd4#
      • 1...Be6!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Sf5#
      • 1...Qxe2
        • 2.Qxd4#
      • 1...Sd6
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...f3
        • 2.Rxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • R(h);N_GUARD::QAB1(E),XP(g)
    • B(a);N_GUARD::S(F),XB(a)
    • S(f);OGATE::QAR1(E)
    • P(e);OGATE,P_PINS(G)::R1(H),XP(e)
    • P(g);OGATE::QAR1(E),XP(g)
  • Tries
    • Try
      • Q(E);P_PINS(f)
      • Threat
        • S(G)
      • Vars
        • Q(b);N_GUARD,XP(C)::QAB1(E),XP(e)
      • Refutation
        • B(a);
  • Actual
    • Q(E);
    • Threat
      • S(G)
    • Vars
      • Q(b);N_GUARD,XP(C)::QAB1(E),XP(e)
      • S(f);OGATE::QAR1(E)
      • P(e);OGATE,P_PINS(G)::QAR1(E),XP(e)
      • P(g);OGATE::R1(I),XP(g)
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