MESON Chess Problem Database

Problem Display
PID: 157047 (5b2/2Kp1Q2/3p1P2/2p1k3/2PN4/3P4/4P1N1/4B3 w - - 0 1)

Perone, D

6th Comm., Best Problems, 2007

5b2/2Kp1Q2/3p1P2/2p1k3/2PN4/3P4/4P1N1/4B3

#2

9 + 5

4901 Best Problems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qd5#
  • Tries
    • 1.Bh4?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kxd4!
    • 1.Qh5+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kxf6!
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Qd5#
        • 2.Qe3#
        • 2.Qe4#
      • 1...dxe6!
    • 1.Qe7+?
      • 1...Kxd4
        • 2.Qe3#
        • 2.Qe4#
      • 1...Bxe7!
    • 1.e3?
      • threat
        • 2.Bg3#
      • 1...Bh6
        • 2.Qe7#
      • 1...cxd4!
  • Keys
    • 1.e4!
      • threat
        • 2.Sf3#
      • 1...Kxd4
        • 2.Qd5#
      • 1...cxd4
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT,XS(F)::QAR1(I)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR1(I)
      • Vars
        • P(c);::QAR1(I),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XS(F)
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(F)::QAR1(I)
      • Refutation
        • K(b);S_FLIGHT,XP(G)
    • Try
      • Q(I);CHECK
      • Refutation
        • P(d);XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • B(e);XQ(I)
    • Try
      • P(B);
      • Threat
        • B(A)
      • Vars
        • B(e);N_GUARD::QAR2(I)
      • Refutation
        • P(a);XS(F)
  • Actual
    • P(B);
    • Threat
      • S(F)
    • Vars
      • K(b);S_FLIGHT,XS(F)::QAR1(I)
      • P(a);SBLOCK,XS(F)::B(A)
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