MESON Chess Problem Database

Problem Display
PID: 186341 (8/b4K2/3p4/3rNpR1/4k3/1Q2p1P1/1Bn1P3/1b6 w - - 0 1)

Roosendaal, Jan C

Tijdschrift vd KNSB, 1957

8/b4K2/3p4/3rNpR1/4k3/1Q2p1P1/1Bn1P3/1b6

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Qxd3#
      • 2.exd3#
    • 1...Ra5
      • 2.Qd3#
    • 1...Rb5
      • 2.Qd3#
    • 1...Rc5
      • 2.Qd3#
    • 1...Rxe5
      • 2.Qd3#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sf6#
      • 1...Rd4
        • 2.Qe6#
      • 1...Bd4
        • 2.Qd3#
      • 1...Sd4!
    • 1.Rg4+?
      • 1...f4
        • 2.Rxf4#
      • 1...fxg4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...fxg4
        • 2.Qxd5#
      • 1...Rd4
        • 2.Qe6#
      • 1...Bd4
        • 2.Qd3#
      • 1...Sd4
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD::QAB1(C)
    • R(e);N_GUARD,XS(E)::QAB1(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • R(e);OGATE::QAR2(C)
        • B(h);S_CUTR(e)::QAB1(C)
      • Refutation
        • S(b);
    • Try
      • R(F);CHECK
      • Vars
        • P(f);P_SPINP(f)::R1(F),XP(f)
      • Refutation
        • P(f);XR(F)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • P(f);XS(E)::QAB1(C),XR(e)
      • R(e);OGATE::QAR2(C)
      • B(h);S_CUTR(e)::QAB1(C)
      • S(b);N_GUARD,S_CUTB(h)::QAR1(C),XP(c)
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