MESON Chess Problem Database

Problem Display
PID: 179901 (8/B2B1p1Q/b2p1p1P/1n1kp3/1KN1N2r/1Pp4p/2PpPrn1/3R2bq w - - 0 1)

Gross, Erwin

Die Schwalbe, 1961

8/B2B1p1Q/b2p1p1P/1n1kp3/1KN1N2r/1Pp4p/2PpPrn1/3R2bq

#2

11 + 15

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Sxf6#
    • 1...Rxe4
      • 2.Qxf7#
    • 1...Se1
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sf4
      • 2.Se3#
      • 2.Sxf6#
    • 1...Sa3
      • 2.Sxc3#
    • 1...Sd4
      • 2.Sb6#
      • 2.Sxc3#
    • 1...Sc7
      • 2.Sxc3#
    • 1...f5
      • 2.Sf6#
  • Tries
    • 1.Sexd2?
      • threat
        • 2.Qxf7#
      • 1...Rxc4+
        • 2.bxc4#
      • 1...Sxa7
        • 2.Se4#
      • 1...Sf4
        • 2.Se3#
      • 1...Sd4
        • 2.Sb6#
      • 1...Sc7
        • 2.Se4#
      • 1...cxd2!
    • 1.Rxd2+?
      • 1...Sd4
        • 2.Sb6#
        • 2.Sxc3#
      • 1...cxd2!
    • 1.e3?
      • threat
        • 2.Sb6#
      • 1...Rxe4
        • 2.Qxf7#
      • 1...Sxe3
        • 2.Sxe3#
      • 1...f5
        • 2.Sf6#
      • 1...Rf5!
  • Keys
    • 1.Scxd2!
      • threat
        • 2.Qxf7#
      • 1...Rxe4+
        • 2.Qxe4#
      • 1...Sxa7
        • 2.Sc4#
      • 1...cxd2
        • 2.c4#
      • 1...Sf4
        • 2.Sxf6#
      • 1...Sd4
        • 2.Sxc3#
      • 1...Sc7
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD,XP(C)::S(G),XP(n)
    • R(h);P_PINS(F),SBLOCK,XS(G)::QAB(K),XP(o)
    • S(e);N_GUARD::S(F)
    • S(e);N_GUARD::S(F),XS(e)
    • S(i);N_GUARD::S(G),XP(f)
    • P(n);S_CUTR(d)::S(G)
  • Tries
    • Try
      • S(G);P_SPINS(F),XP(c)
      • Threat
        • QAB(K),XP(o)
      • Vars
        • R(h);CHECK,OGATE,XS(F)::P(D),XR(h)
        • S(i);N_GUARD,XB(I)::R(A)+S(G)
        • S(e);N_PINS(F)::S(F)
        • S(i);N_PINS(F),SBLOCK::S(F)
        • S(i);N_GUARD::R(A)+S(G)
      • Refutation
        • P(f);P_SPINP(f),XS(G)
    • Try
      • R(A);CHECK,XP(c)
      • Refutation
        • P(f);XR(A)
    • Try
      • P(C);
      • Threat
        • S(F)
      • Vars
        • R(h);P_PINS(F),SBLOCK,XS(G)::QAB(K),XP(o)
        • S(e);XP(C)::S(F),XS(e)
        • P(n);S_CUTR(d)::S(G)
      • Refutation
        • R(d);
  • Actual
    • S(F);P_SPINS(G),XP(c)
    • Threat
      • QAB(K),XP(o)
    • Vars
      • R(h);CHECK,OGATE,XS(G)::QAB1(K),XR(h)
      • S(i);N_GUARD,XB(I)::R(A)+S(F)
      • P(f);OGATE,P_SPINP(f),XS(F)::P(B)
      • S(e);N_PINS(G)::S(G),XP(n)
      • S(i);N_PINS(G)::S(G),XP(f)
      • S(i);N_GUARD::R(A)+S(F)
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