MESON Chess Problem Database

Problem Display
PID: 12041 (1b2R3/3K4/N7/nP1k4/1R1N3n/1ppPpp2/B2r3p/7Q w - - 0 1)

Gross, Erwin

Die Schwalbe, 1974

1b2R3/3K4/N7/nP1k4/1R1N3n/1ppPpp2/B2r3p/7Q

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Qxf3#
    • 1...Sg6
      • 2.Qxf3#
    • 1...Sc6
      • 2.Bxb3#
    • 1...Sb7
      • 2.Bxb3#
  • Tries
    • 1.Sxb3?
      • threat
        • 2.Rd4#
      • 1...Rxd3
        • 2.Sxa5#
      • 1...Sxb3
        • 2.Bxb3#
      • 1...Ba7
        • 2.Sc7#
      • 1...Sf5
        • 2.Qxf3#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sc6
        • 2.Sxd2#
      • 1...Be5!
    • 1.Sc6?
      • threat
        • 2.Rd4#
      • 1...Sxc6
        • 2.Bxb3#
      • 1...Be5
        • 2.Se7#
        • 2.Rxe5#
      • 1...Ba7
        • 2.Re5#
      • 1...Sf5
        • 2.Qxf3#
      • 1...Sc4
        • 2.dxc4#
      • 1...Rxd3!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Rd4#
      • 1...Rxd3
        • 2.Sxh4#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Be5
        • 2.Rxe5#
      • 1...Ba7
        • 2.Re5#
      • 1...Sf5
        • 2.Sxd2#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sc6
        • 2.Bxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD::QAB(A),XP(f)
    • S(h);N_GUARD::B(B),XP(c)
  • Tries
    • Try
      • S(E);P_PINP(f),XP(c)
      • Threat
        • R1(D)
      • Vars
        • R(a);N_GUARD,XP(C)::B(B)+S(E),XS(h)
        • S(h);OGATE,P_SPINS(h),XS(E)::B(B),XS(h)
        • B(j);N_GUARD::S(G)
        • S(g);N_GUARD::QAB(A),XP(f)
        • S(h);OGATE::P(C),XS(h)
        • S(h);N_GUARD::B(B)+S(E),XR(a)
      • Refutation
        • B(j);
    • Try
      • S(E);
      • Threat
        • R1(D)
      • Vars
        • S(h);N_GUARD,XS(E)::B(B),XP(c)
        • B(j);N_GUARD::R1(I)
        • S(g);N_GUARD::QAB(A),XP(f)
        • S(h);N_SPINP(c),OGATE,P_SPINP(f)::P(C),XS(h)
      • Refutation
        • R(a);XP(C)
  • Actual
    • S(E);XP(f)
    • Threat
      • R1(D)
    • Vars
      • R(a);N_GUARD,XP(C)::QAB(A)+S(E),XS(g)
      • S(g);OGATE,P_SPINS(g),XS(E)::QAB(A),XS(g)
      • B(j);N_GUARD::R1(I),XB(j)
      • B(j);N_GUARD::R1(I)
      • S(g);N_GUARD::QAB(A)+S(E),XR(a)
      • S(h);N_SPINP(c),OGATE::P(C),XS(h)
      • S(h);N_GUARD::B(B),XP(c)
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