MESON Chess Problem Database

Problem Display
PID: 137517 (8/3R2n1/5Q2/1K6/4k3/1n6/8/3N4 w - - 0 1)

Lassahn, Holger

Freie Presse, 1999

8/3R2n1/5Q2/1K6/4k3/1n6/8/3N4

#2

4 + 3

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rd4#
    • 1...Sc1
      • 2.Rd4#
    • 1...Sd2
      • 2.Rd4#
    • 1...Sd4+
      • 2.Rxd4#
    • 1...Sa5
      • 2.Rd4#
    • 1...Sc5
      • 2.Rd4#
  • Tries
    • 1.Re7+?
      • 1...Kd3
        • 2.Qc3#
      • 1...Kd5
        • 2.Sc3#
        • 2.Se3#
        • 2.Qe5#
      • 1...Se6!
  • Keys
    • 1.Rd5!
      • 1...Sd4+
        • 2.Rxd4#
      • 1...Kxd5
        • 2.Sc3#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sh5
        • 2.Qf5#
      • 1...Sa1
        • 2.Rd4#
      • 1...Sc1
        • 2.Rd4#
      • 1...Sd2
        • 2.Rd4#
      • 1...Sa5
        • 2.Rd4#
      • 1...Sc5
        • 2.Rd4#
      • 1...Se6
        • 2.Qf5#
      • 1...Se8
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R1(D)
    • S(a);CHECK,N_GUARD::R1(D),XS(a)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(C)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • R(D);
    • Vars
      • S(a);CHECK,N_GUARD::R1(D),XS(a)
      • K(b);S_FLIGHT,XR(D)::S(A)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • S(c);N_GUARD::QAB1(C)
      • S(a);N_GUARD::R1(D)
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