MESON Chess Problem Database

Problem Display
PID: 248967 (5r2/6pb/3B1prb/R6p/1pR1NPkp/8/8/1K2nQ2 w - - 0 1)

Weisser, Berthold

Die Schwalbe, 1929

5r2/6pb/3B1prb/R6p/1pR1NPkp/8/8/1K2nQ2

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qg2#
    • 1...Sg2
      • 2.Qxg2#
    • 1...Sd3
      • 2.Qg2#
    • 1...Sf3
      • 2.Qg2#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Sf2#
        • 2.Qh3#
      • 1...h3
        • 2.Qxh3#
      • 1...Rg5
        • 2.Qh3#
      • 1...Sg2
        • 2.Sf2#
        • 2.Qe2#
        • 2.Qxg2#
        • 2.Qd1#
        • 2.Qf3#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg2#
        • 2.Qxf3#
      • 1...bxc3!
    • 1.Qe2+?
      • 1...Sf3
        • 2.Qg2#
      • 1...Kh3!
    • 1.Qg1+?
      • 1...Kh3
        • 2.Sf2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Kf3!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qh3#
      • 1...Rxg5+
        • 2.f5#
      • 1...Kg3
        • 2.f5#
      • 1...Bxg5
        • 2.fxg5#
      • 1...fxg5
        • 2.f5#
      • 1...h3
        • 2.Qxh3#
      • 1...Sg2
        • 2.Qxg2#
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAR2(B)
    • S(a);N_GUARD::QAR2(B),XS(a)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB1(B),XP(d)
        • R(g);P_PINS(D)::QAB1(B)
        • S(a);N_GUARD::QAR2(B)
      • Refutation
        • P(b);XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::S(D)
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB1(B)
    • Vars
      • R(g);CHECK,SBLOCK,XS(D)::R(C)+P(E)
      • K(c);P-FLIGHT::B(G)+P(E)
      • B(h);OGATE,XS(D)::R(C)+P(E),XB(h)
      • P(f);SBLOCK,XS(D)::R(C)+P(E)
      • P(d);::QAB1(B),XP(d)
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Developed and maintained by Brian Stephenson.
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