MESON Chess Problem Database

Problem Display
PID: 158355 (4R3/8/4p3/3p1q2/3N1P2/RpB1kPP1/1Nb2nQ1/K7 w - - 0 1)

Shire, David J

British Chess Magazine, 2001

4R3/8/4p3/3p1q2/3N1P2/RpB1kPP1/1Nb2nQ1/K7

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd2#
      • 2.Qe2#
    • 1...Sh1
      • 2.Qd2#
      • 2.Qe2#
    • 1...Sd3
      • 2.Sxf5#
      • 2.Qd2#
      • 2.Qe2#
    • 1...Sh3
      • 2.Qd2#
      • 2.Qe2#
    • 1...Se4
      • 2.Qe2#
    • 1...Sg4
      • 2.Qd2#
      • 2.Qe2#
  • Tries
    • 1.Sd1+?
      • 1...Kd3
        • 2.Qf1#
      • 1...Sxd1
        • 2.Qd2#
        • 2.Qe2#
      • 1...Bxd1!
    • 1.Bd2+?
      • 1...Kxd4
        • 2.Qxf2#
      • 1...Kxd2!
  • Keys
    • 1.Be1!
      • threat
        • 2.Qxf2#
      • 1...Kxd4
        • 2.Qxf2#
      • 1...Sd1
        • 2.Qd2#
      • 1...Sh1
        • 2.Qd2#
      • 1...Sd3
        • 2.Sxf5#
      • 1...Sh3
        • 2.Qd2#
      • 1...Se4
        • 2.Sxc2#
      • 1...Sg4
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);N_SPINP(g),OGATE::QAR1(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);N_SPINP(g),P-FLIGHT::QAB(C)
      • Refutation
        • B(a);XS(B)
    • Try
      • B(E);CHECK,N_PINP(g),P_PINP(c)
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT,XS(H)::QAB(C),XS(b)
      • Refutation
        • K(d);N_SPINP(c),P_SPINS(b),S_FLIGHT,XB(E)
  • Actual
    • B(E);N_PINP(g),P_PINP(c)
    • Threat
      • QAB1(C),XS(b)
    • Vars
      • K(d);N_SPINP(c),S_FLIGHT,XS(H)::QAB(C),XS(b)
      • S(b);OGATE::QAB1(C)
      • S(b);N_SPINP(c),P_SPINP(g),S_CUTB(a)::S(H),XQ(f)
      • S(b);S_CUTQ(f)::S(H),XB(a)
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