MESON Chess Problem Database

Problem Display
PID: 5089 (8/8/4nK2/4Qn2/rN6/8/1P1N4/k2r4 w - - 0 1)

Mach, Julius Zdenek

Ceske listy sachove, 1899

8/8/4nK2/4Qn2/rN6/8/1P1N4/k2r4

#2

5 + 5

3360 Simple Two-move Themes 1924
5454 Near Snap 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sb3#
    • 1...Ra2
      • 2.Sc2#
  • Keys
    • 1.Qc3!
      • threat
        • 2.b3#
      • 1...Rxd2
        • 2.Qc1#
      • 1...Rxb4
        • 2.Qa3#
      • 1...Rb1
        • 2.Sb3#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Ra2
        • 2.Sc2#

This anticipates 281874(2025)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::S(B)
    • R(c);SBLOCK::S(C)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)+P(A)
    • Vars
      • R(b);N_GUARD,XS(B)::QAR2(D)
      • R(c);N_GUARD,XS(C)::QAR2(D)
      • R(b);SBLOCK::S(B)
      • R(b);N_GUARD::QAR2(D),XR(b)
      • R(c);SBLOCK::S(C)
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