MESON Chess Problem Database

Problem Display
PID: 176081 (5B2/2Q2Pb1/p4q2/8/k1B1N2R/rnp2p2/N3pP2/R3K3 w - - 0 1)

Berkenbusch, Helmut

Schach-Echo, 1936

5B2/2Q2Pb1/p4q2/8/k1B1N2R/rnp2p2/N3pP2/R3K3

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Rxa2#
    • 1...Sxa1
      • 2.Sc5#
    • 1...Sc1
      • 2.Sc5#
    • 1...Sd2
      • 2.Sc5#
    • 1...Sd4
      • 2.Saxc3#
      • 2.Sc5#
    • 1...Sa5
      • 2.Sc5#
    • 1...Sc5
      • 2.Sxc5#
  • Tries
    • 1.Bxb3+?
      • 1...Kb5
        • 2.Qc5#
      • 1...Rxb3
        • 2.Saxc3#
        • 2.Sexc3#
      • 1...Kxb3!
    • 1.Bb5+?
      • 1...axb5
        • 2.Sexc3#
        • 2.Sc5#
      • 1...Kxb5!
    • 1.Qa5+?
      • 1...Sxa5
        • 2.Sc5#
      • 1...Kxa5!
    • 1.Qc6+?
      • 1...Ka5
        • 2.Bb4#
      • 1...Qxc6!
  • Keys
    • 1.Be6!
      • threat
        • 2.Sexc3#
      • 1...Kb5
        • 2.Sd6#
      • 1...Qxh4
        • 2.Bd7#
      • 1...Qf4
        • 2.Bd7#
      • 1...Sd4
        • 2.Saxc3#
      • 1...c2
        • 2.Sec3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(b);OGATE,P_SPINR(b),XS(C)::R(A),XR(b)
    • S(c);N_GUARD,XR(A)::S(F)
    • S(c);N_GUARD::S(F)
    • S(c);N_GUARD::S(F),XS(c)
  • Tries
    • Try
      • B(E);CHECK,XS(c)
      • Vars
        • K(f);S_FLIGHT::QAR1(H)
      • Refutation
        • K(f);S_FLIGHT,XB(E)
    • Try
      • B(E);CHECK
      • Refutation
        • K(f);S_FLIGHT,XB(E)
    • Try
      • Q(H);CHECK
      • Vars
        • S(c);SBLOCK,XQ(H)::S(F)
      • Refutation
        • K(f);P-FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);P-FLIGHT::B(J)
      • Refutation
        • Q(h);XQ(H)
  • Actual
    • B(E);
    • Threat
      • R(G)+S(F),DCHECK,XP(d)
    • Vars
      • K(f);S_FLIGHT::S(F)
      • Q(h);N_GUARD,P_PINP(D),SBLOCK,XR(G)::B(E)
      • Q(h);N_GUARD::B(E)
      • S(c);S_CUTQ(h)::S(C),XP(d)
      • P(d);::R(G)+S(F),DCHECK
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