MESON Chess Problem Database

Problem Display
PID: 278016 (3N1R2/2Qp1bn1/r2r2pn/1N2Pk1p/1p1P4/1P1K4/8/2BB4 w - - 0 1)

Koetsheid, Petrus Albertus

To Mat, 1954

3N1R2/2Qp1bn1/r2r2pn/1N2Pk1p/1p1P4/1P1K4/8/2BB4

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sxd6#
    • 1...Ra2
      • 2.Sxd6#
    • 1...Ra3
      • 2.Sxd6#
    • 1...Ra4
      • 2.Sxd6#
    • 1...Ra5
      • 2.Sxd6#
    • 1...Ra7
      • 2.Sxd6#
    • 1...Ra8
      • 2.Sxd6#
    • 1...Rxd4+
      • 2.Sxd4#
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qf2#
      • 1...Rxd4+
        • 2.Kxd4#
      • 1...g5
        • 2.Ke3#
      • 1...Ra2
        • 2.Sxd6#
      • 1...Sg4
        • 2.Ke2#
      • 1...Se6
        • 2.Kc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(d);N_GUARD::S(F),XR(e)
    • R(d);N_GUARD,N_PINP(E),P_PINP(C)::S(F),XR(e)
    • R(e);CHECK,XP(E)::S(F),XR(e)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)
    • Vars
      • R(e);CHECK,XP(E)::QAB(H)+K(D),XR(e)
      • P(f);SBLOCK::QAB(H)+K(D)
      • R(d);N_GUARD::S(F),XR(e)
      • S(g);SBLOCK::QAB(H)+K(D)
      • S(j);::QAB(H)+K(D)
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