MESON Chess Problem Database

Problem Display
PID: 59584 (8/3pp3/1KBk4/5P2/1PpPp3/3QN1N1/bb1R4/n6q w - - 0 1)

Casa, Alex

4th HM., The Problemist, 2005/II

8/3pp3/1KBk4/5P2/1PpPp3/3QN1N1/bb1R4/n6q

#2

9 + 9

56 The Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sxe4#
    • 1...Qc1
      • 2.Sxe4#
    • 1...Qd1
      • 2.Sxe4#
    • 1...Qe1
      • 2.Sxe4#
    • 1...Qf1
      • 2.Sxe4#
    • 1...Qg1
      • 2.Sxe4#
    • 1...Qh2
      • 2.Sxe4#
    • 1...Qh3
      • 2.Sxe4#
    • 1...Qh5
      • 2.Sxe4#
    • 1...Qh6
      • 2.Sxe4#
    • 1...Qh7
      • 2.Sxe4#
    • 1...Qh8
      • 2.Sxe4#
    • 1...Bb1
      • 2.Sxc4#
    • 1...Bxd4+
      • 2.Qxd4#
    • 1...Sb3
      • 2.Sxc4#
  • Tries
    • 1.Qxe4?
      • threat
        • 2.Qe5#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Qxe4
        • 2.Sxe4#
      • 1...dxc6
        • 2.Qe6#
      • 1...e5
        • 2.Qxe5#
      • 1...Qh8
        • 2.Qd5#
      • 1...e6!
  • Keys
    • 1.Qxc4!
      • threat
        • 2.Qc5#
      • 1...Bxc4
        • 2.Sxc4#
      • 1...dxc6
        • 2.Qxc6#
      • 1...Qc1
        • 2.Sxe4#
      • 1...Sb3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(b);N_GUARD::S(D),XP(f)
    • B(c);N_GUARD::S(C),XP(e)
    • B(d);CHECK,OGATE,P_SPINB(d),XP(F)::QAR2(B),XB(d)
    • S(a);S_CUTB(c)::S(C),XP(e)
  • Tries
    • Try
      • Q(B);XP(f)
      • Threat
        • QAB1(B)
      • Vars
        • B(d);CHECK,OGATE,P_SPINB(d),XP(F)::R(A),XB(d)
        • Q(b);XQ(B)::S(D),XQ(b)
        • P(h);N_GUARD,XB(I)::QAR1(B)
        • P(i);::QAB1(B),XP(i)
        • Q(b);N_GUARD::QAR1(B)
      • Refutation
        • P(i);
  • Actual
    • Q(B);XP(e)
    • Threat
      • QAB1(B)
    • Vars
      • B(c);XQ(B)::S(C),XB(c)
      • P(h);OGATE,XB(I)::QAR1(B),XP(h)
      • Q(b);N_GUARD::S(D),XP(f)
      • S(a);S_CUTB(c)::QAR1(B)
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