MESON Chess Problem Database

Problem Display
PID: 175265 (8/2Bp2KB/3p4/3Nn2R/1P1knP2/1Q4p1/4R3/2r4b w - - 0 1)

Berlin, Dieter

3rd Comm., Rochade, 1979

8/2Bp2KB/3p4/3Nn2R/1P1knP2/1Q4p1/4R3/2r4b

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Bb6#
    • 1...Sf3
      • 2.Rxe4#
    • 1...g2
      • 2.Rxe4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sf5#
      • 1...Rc3
        • 2.Qd5#
      • 1...Sc3
        • 2.Bb6#
      • 1...Sc4
        • 2.Rd5#
      • 1...Rc4!
    • 1.Sb6?
      • threat
        • 2.Qe3#
      • 1...Rc3
        • 2.Qd5#
      • 1...Sd3
        • 2.Rd5#
      • 1...Sc4
        • 2.Rd5#
      • 1...Sg4
        • 2.Rd5#
      • 1...Sc3!
    • 1.Rd2+?
      • 1...Sd3
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Sxd2!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sf5#
      • 1...Rc3
        • 2.Qd5#
      • 1...Rc4
        • 2.Qe3#
      • 1...Sc3
        • 2.Bb6#
      • 1...Sc4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(e);N_GUARD,S_CUTR(a)::B(G)
    • S(f);S_CUTB(b)::R1(A),XS(e)
    • P(c);S_CUTB(b)::R1(A),XS(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • R(a);SBLOCK::QAR1(B)
        • S(e);N_GUARD,S_CUTR(a)::B(G)
        • S(f);OGATE::R1(F)
      • Refutation
        • R(a);
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • R(a);SBLOCK::QAR1(B)
        • S(f);OGATE::R1(F)
      • Refutation
        • S(e);
    • Try
      • R(A);CHECK
      • Refutation
        • S(e);XR(A)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • R(a);SBLOCK::QAR1(B)
      • R(a);SBLOCK::QAB1(B)
      • S(e);N_GUARD,S_CUTR(a)::B(G)
      • S(f);OGATE::R1(F)
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