MESON Chess Problem Database

Problem Display
PID: 90165 (8/6N1/5pq1/2p5/1n3Rp1/B1Qpk1K1/1nb1P3/2b2B2 w - - 0 1)

Weisser, Berthold

Die Schwalbe, 1949

8/6N1/5pq1/2p5/1n3Rp1/B1Qpk1K1/1nb1P3/2b2B2

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Sxf5#
    • 1...Qf7
      • 2.Sf5#
    • 1...Qe8
      • 2.Sf5#
    • 1...Qh6
      • 2.Sf5#
    • 1...Bd2
      • 2.Qxc5#
    • 1...Sd1
      • 2.Bxc1#
    • 1...Sa4
      • 2.Bxc1#
    • 1...Sa2
      • 2.Bxc5#
    • 1...Sd5
      • 2.Bxc5#
  • Keys
    • 1.exd3!
      • threat
        • 2.Qe1#
      • 1...Qxd3
        • 2.Sf5#
      • 1...Bxd3
        • 2.Qxc1#
      • 1...S2xd3
        • 2.Bxc1#
      • 1...S4xd3
        • 2.Bxc5#
      • 1...Qe4
        • 2.Rxe4#
      • 1...Bd2
        • 2.Qxc5#
      • 1...Bd1
        • 2.Qxc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • Q(j);N_GUARD::S(G),XQ(j)
    • Q(j);N_GUARD::S(G)
    • B(a);SBLOCK::QAB(D),XP(h)
    • S(b);OGATE::B(C),XB(a)
    • S(f);OGATE::B(C),XP(h)
  • Actual
    • P(B);XP(d)
    • Threat
      • QAR2(D)
    • Vars
      • Q(j);N_GUARD,P_SPINQ(j),XP(B)::S(G)
      • B(c);OGATE,P_SPINB(c),XP(B)::QAB(D),XB(a)
      • S(b);OGATE,P_SPINS(b),XP(B)::B(C),XB(a)
      • S(f);OGATE,P_SPINS(f),XP(B)::B(C),XP(h)
      • Q(j);N_GUARD::R1(F),XQ(j)
      • B(a);SBLOCK::QAB(D),XP(h)
      • B(c);OGATE::QAB(D),XB(a)
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