MESON Chess Problem Database

Problem Display
PID: 269848 (b2k1K2/3q4/1P6/N7/8/8/7B/2RR4 w - - 0 1)

Valtonen, Kari

Tehtavaniekka, 2020

b2k1K2/3q4/1P6/N7/8/8/7B/2RR4

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Rxd6#
    • 1...Bb7
      • 2.Sxb7#
  • Keys
    • 1.b7!
      • threat
        • 2.Sc6#
        • 2.Bc7#
        • 2.Rc8#
        • 2.bxa8Q#
        • 2.bxa8R#
        • 2.b8Q#
        • 2.b8R#
      • 1...Qd6+
        • 2.Rxd6#
      • 1...Qxd1
        • 2.Rxd1#
      • 1...Bxb7
        • 2.Sxb7#
      • 1...Qd2
        • 2.Rxd2#
      • 1...Qd3
        • 2.Rxd3#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Qd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATEB::R(B),XQ(a)
    • B(b);N_GUARD::S(D),XB(b)
  • Actual
    • P(E);
    • Threat
      • DUALS(7)
    • Vars
      • Q(a);CHECK,OGATEB::R(B),XQ(a)
      • Q(a);N_SPINQ(a),OGATE,XR(B)::R(A),XQ(a)
      • B(b);XP(E)::S(D),XB(b)
      • Q(a);OGATEB::R(B),XQ(a)
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