MESON Chess Problem Database

Problem Display
PID: 281874 (8/3nK3/4p3/8/rN6/3Q4/1P1N4/k2r4 w - - 0 1)

Lipka, Jan

Sachmatija, 2025

8/3nK3/4p3/8/rN6/3Q4/1P1N4/k2r4

#2

5 + 5

5454 Near Snap 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qxb1#
    • 1...Ra3
      • 2.Qxa3#
    • 1...Rxb4
      • 2.Qa3#
  • Tries
    • 1.Sc2+?
      • 1...Ka2
        • 2.Qb3#
      • 1...Kxb2!
  • 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#

Anticipated by 5089(1899)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::QAR1(C),XR(b)
    • R(c);N_GUARD::QAR2(C),XR(c)
    • R(c);N_GUARD,XS(D)::QAR2(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XP(A)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+P(A)
    • Vars
      • R(b);N_GUARD,XS(B)::QAR2(C)
      • R(c);N_GUARD,XS(D)::QAR2(C)
      • R(b);SBLOCK::S(B)
      • R(b);N_GUARD::QAR2(C),XR(b)
      • R(c);SBLOCK::S(D)
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