MESON Chess Problem Database

Problem Display
PID: 56673 (2rk1K2/2rpp3/1Q2P3/8/8/8/8/2R5 w - - 0 1)

Lazard, Frederic

La Strategie, 1902

2rk1K2/2rpp3/1Q2P3/8/8/8/8/2R5

#2

4 + 5

797 Bulletin de la FFE 1923
6315 Mes problemes et etudes d'echecs (Lazard) 1929

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Qxc7#
    • 1...Rb8
      • 2.Qxc7#
    • 1...dxe6
      • 2.Rd1#
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qxe7#
      • 1...Rxc1
        • 2.Qxd7#
      • 1...exd6
        • 2.e7#
      • 1...Ra8
        • 2.Qxc7#
      • 1...Rb8
        • 2.Qxc7#
      • 1...Rc2
        • 2.Qxd7#
      • 1...Rc3
        • 2.Qxd7#
      • 1...Rc4
        • 2.Qxd7#
      • 1...Rc5
        • 2.Qxd7#
      • 1...Rc6
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD::QAB1(B),XR(a)
    • P(b);OGATEB,XP(C)::R(A)
  • Actual
    • Q(B);N_PINR(a),P_PINP(b)
    • Threat
      • QAB1(B),XP(c)
    • Vars
      • R(a);N_GUARD,XR(A)::QAR1(B),XP(b)
      • P(c);N_SPINP(b),OGATE,XQ(B)::P(C)
      • R(d);N_GUARD::QAB1(B),XR(a)
      • R(a);N_GUARD::QAR1(B),XP(b)
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