MESON Chess Problem Database

Problem Display
PID: 141562 (7B/6Nb/1pBp3r/r1P1RpP1/3k1p1p/1Pn5/p3P3/Q4K2 w - - 0 1)

Keller, Michael

Die Schwalbe, 1967

7B/6Nb/1pBp3r/r1P1RpP1/3k1p1p/1Pn5/p3P3/Q4K2

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qxc3#
    • 1...Rh5
      • 2.Se6#
    • 1...Re6
      • 2.Sxe6#
    • 1...Rg6
      • 2.Sxf5#
    • 1...Bg6
      • 2.Se6#
    • 1...Bg8
      • 2.Sxf5#
  • Tries
    • 1.Re4+?
      • 1...Kxc5
        • 2.Rc4#
        • 2.Qxc3#
      • 1...fxe4!
    • 1.Rd5+?
      • 1...Ke3
        • 2.Rd3#
      • 1...Ke4!
    • 1.gxh6?
      • threat
        • 2.Se6#
      • 1...Kxe5
        • 2.Qxc3#
      • 1...Bg8
        • 2.Sxf5#
      • 1...dxe5!
    • 1.g6?
      • threat
        • 2.Sxf5#
        • 2.Se6#
      • 1...Kxe5
        • 2.Qxc3#
      • 1...Rxg6
        • 2.Sxf5#
      • 1...Bxg6
        • 2.Se6#
      • 1...d5
        • 2.Se6#
      • 1...Rh5
        • 2.Se6#
      • 1...Bg8
        • 2.Sxf5#
      • 1...dxe5!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qxc3#
      • 1...Kxe3
        • 2.Qxc3#
      • 1...Kxc5
        • 2.Qxc3#
      • 1...Rxc5
        • 2.Sxf5#
      • 1...fxe3
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(c);S_FLIGHT,XR(F)::QAB(A),XS(b)
    • R(j);N_GUARD::S(I)
    • R(j);N_GUARD::S(I),XR(j)
    • R(j);S_CUTB(k)::S(I),XP(g)
    • B(k);S_CUTR(j)::S(I)
    • B(k);N_GUARD::S(I),XP(g)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • P(g);XR(F)
    • Try
      • R(F);CHECK
      • Vars
        • K(c);N_SPINS(b),OGATE,S_FLIGHT::R1(F)
      • Refutation
        • K(c);N_SPINS(b),P-FLIGHT
    • Try
      • P(G);XR(j)
      • Threat
        • S(I)
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAB(A),XS(b)
        • B(k);N_GUARD::S(I),XP(g)
      • Refutation
        • P(i);XR(F)
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAB(A),XS(b)
        • R(j);XP(G)::S(I),XP(g)
        • B(k);XP(G)::S(I)
        • P(i);::S(I)
        • R(j);::S(I)
        • B(k);::S(I),XP(g)
      • Refutation
        • P(i);XR(F)
  • Actual
    • R(F);
    • Threat
      • QAB1(A),XS(b)
    • Vars
      • K(c);N_SPINS(b),S_FLIGHT,XR(F)::QAR2(A),XS(b)
      • K(c);N_SPINS(b),S_FLIGHT,XP(E)::QAR2(A),XS(b)
      • R(f);SBLOCK,XP(E)::B(J)+S(I),DCHECK,XP(g)
      • P(d);SBLOCK,XR(F)::B(J)+S(I),DCHECK
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