MESON Chess Problem Database

Problem Display
PID: 174956 (8/r1pQ4/3pR3/1Nk5/3R1rp1/N4pP1/5K2/8 w - - 0 1)

Ros, Johan August

370 Utvalda Svenska Schackprob, 1901

8/r1pQ4/3pR3/1Nk5/3R1rp1/N4pP1/5K2/8

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qxc7#
    • 1...Ra5
      • 2.Qxc7#
    • 1...Ra8
      • 2.Qxc7#
    • 1...d5
      • 2.Rc6#
      • 2.Qc6#
      • 2.Qxd5#
      • 2.Qe7#
    • 1...c6
      • 2.Qxa7#
  • Keys
    • 1.Sxd6!
      • 1...Kxd4
        • 2.Se4#
      • 1...Kb6
        • 2.Qb5#
      • 1...Rxd4
        • 2.Qb5#
      • 1...Rxa3
        • 2.Sb7#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Re4
        • 2.Sxe4#
      • 1...Rf5
        • 2.Se4#
      • 1...Rf6
        • 2.Se4#
      • 1...Rf7
        • 2.Se4#
      • 1...Rf8
        • 2.Se4#
      • 1...Ra4
        • 2.Sb7#
      • 1...Ra5
        • 2.Sb7#
      • 1...Ra6
        • 2.Sb7#
      • 1...Rb7
        • 2.Sxb7#
      • 1...Ra8
        • 2.Sb7#
      • 1...c6
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::QAR2(G),XP(g)
    • P(g);OGATE,SBLOCK::QAB(G),XR(f)
  • Actual
    • S(E);XP(e)
    • Vars
      • K(d);S_FLIGHT,XR(D)::QAR(G)+S(E)
      • K(d);S_FLIGHT::QAR1(G)
      • R(b);SBLOCK,XR(D)::QAR1(G)
      • R(f);N_GUARD,XS(B)::S(E)
      • P(g);OGATE,XS(E)::QAB1(G),XP(g)
      • R(b);N_GUARD::S(E),XR(b)
      • R(b);N_GUARD::S(E)
      • R(f);N_GUARD::S(E)
      • R(f);N_GUARD::S(E),XR(f)
      • P(g);OGATE,SBLOCK::QAB(G),XR(f)
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