MESON Chess Problem Database

Problem Display
PID: 146671 (8/4qR2/Nn1P4/3p2Rr/B1kp3p/8/KP1nbNQ1/B7 w - - 0 1)

Bicknell, Stephen

Australian Chess Problem Magazine, 1993

8/4qR2/Nn1P4/3p2Rr/B1kp3p/8/KP1nbNQ1/B7

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg5
      • 2.Rc7#
    • 1...Qf6
      • 2.Rc7#
    • 1...Qf8
      • 2.Rc7#
    • 1...Qe3
      • 2.Rc7#
    • 1...Qe4
      • 2.Rc7#
    • 1...Qe5
      • 2.Rc7#
    • 1...Qe6
      • 2.Rc7#
    • 1...Qc7
      • 2.Rxc7#
    • 1...Sb1
      • 2.b3#
    • 1...Sf1
      • 2.b3#
    • 1...Sf3
      • 2.b3#
    • 1...Se4
      • 2.b3#
    • 1...Sxa4
      • 2.Qxd5#
    • 1...Sd7
      • 2.Qxd5#
    • 1...Sa8
      • 2.Qxd5#
    • 1...Sc8
      • 2.Qxd5#
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qc2#
      • 1...Qxe4
        • 2.Rc7#
      • 1...Sxe4
        • 2.b3#
      • 1...Sxa4
        • 2.Qxd5#
      • 1...dxe4
        • 2.Bb5#
      • 1...Bd1
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sb1
        • 2.b3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(i);OGATE,XR(G)::R(J)
    • Q(i);OGATE::R(J)
    • Q(i);OGATE::R(J),XQ(i)
    • S(a);N_GUARD::P(C)
    • S(h);N_GUARD,XB(F)::QAB1(E),XP(f)
    • S(h);N_GUARD::QAB1(E),XP(f)
  • Actual
    • Q(E);P_PINP(d)
    • Threat
      • QAR2(E)
    • Vars
      • Q(i);N_SPINP(d),OGATE,XQ(E)::R(J)
      • S(a);N_GUARD,N_SPINP(d),XQ(E)::P(C)
      • S(h);N_GUARD,XB(F)::QAB1(E),XP(f)
      • P(f);N_SPINP(d),XQ(E)::B(F)
      • B(b);N_GUARD::QAB1(E)
      • B(b);N_GUARD::QAB1(E),XB(b)
      • S(a);N_GUARD::P(C)
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