MESON Chess Problem Database

Problem Display
PID: 186343 (1b6/4Nn2/6Np/q1p4p/2b1k1p1/3r2R1/8/1Q4BK w - - 0 1)

Roosendaal, Jan C

Arbejder-Skak, 1956

1b6/4Nn2/6Np/q1p4p/2b1k1p1/3r2R1/8/1Q4BK

#2

6 + 10

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qxd3#
    • 1...Bb3
      • 2.Qxd3#
    • 1...Bd5
      • 2.Qxd3#
    • 1...Be6
      • 2.Qxd3#
  • Tries
    • 1.Qe1+?
      • 1...Re3
        • 2.Qxe3#
      • 1...Qxe1!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf5#
      • 1...Re3
        • 2.Qxc4#
      • 1...Rf3
        • 2.Qxc4#
      • 1...Rd5
        • 2.Qg2#
      • 1...Be6
        • 2.Qxd3#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Sd6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAB1(A),XR(a)
  • Tries
    • Try
      • Q(A);CHECK,N_PINR(a)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(A),XR(a)
      • Refutation
        • Q(e);P_PINB(B),XQ(A)
  • Actual
    • Q(A);N_PINR(a)
    • Threat
      • QAB1(A)
    • Vars
      • R(a);OGATE::QAR2(A),XB(b)
      • R(a);N_GUARD::QAB(A)
      • B(b);N_GUARD::QAB1(A),XR(a)
      • B(j);N_GUARD::QAR1(A),XB(j)
      • S(i);S_CUTB(j)::QAR1(A)
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