MESON Chess Problem Database

Problem Display
PID: 98413 (7b/8/7Q/8/3r1PK1/3PBB1P/7k/8 w - - 0 1)

Niemeijer, Meindert

Problemas, 1969

7b/8/7Q/8/3r1PK1/3PBB1P/7k/8

#2

7 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4+
      • 2.Qxf4#
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qb2#
      • 1...Rxf4+
        • 2.Bxf4#
      • 1...Rxd3
        • 2.Bg1#
      • 1...Ra4
        • 2.Bg1#
      • 1...Rb4
        • 2.Bg1#
      • 1...Rc4
        • 2.Bg1#
      • 1...Re4
        • 2.Bg1#
      • 1...Rd5
        • 2.Bg1#
      • 1...Rd6
        • 2.Bg1#
      • 1...Rd7
        • 2.Bg1#
      • 1...Rd8
        • 2.Bg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,OGATE,XP(E)::QAB(G),XR(b)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)
    • Vars
      • R(b);CHECK,OGATE,XP(E)::B(B),XR(b)
      • R(b);N_PINP(E),XP(A)::B(B)
      • R(b);SBLOCK::B(B)
      • R(b);::B(B)
      • R(b);N_PINP(E)::B(B)
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