MESON Chess Problem Database

Problem Display
PID: 249503 (4B3/8/8/r1P1pp1N/NnK1kpPb/2p4R/2r2P2/8 w - - 0 1)

Schachter, N

Die Schwalbe, 1929

4B3/8/8/r1P1pp1N/NnK1kpPb/2p4R/2r2P2/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sxc3#
    • 1...Rb2
      • 2.Sxc3#
    • 1...Rd2
      • 2.Sxc3#
    • 1...Re2
      • 2.Sxc3#
    • 1...Rxf2
      • 2.Sxc3#
    • 1...Rxc5+
      • 2.Sxc5#
    • 1...Bxf2
      • 2.Sf6#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Sa2
      • 2.Bc6#
    • 1...Sd3
      • 2.Bc6#
    • 1...Sa6
      • 2.Bc6#
    • 1...Sc6
      • 2.Bxc6#
    • 1...fxg4
      • 2.Bg6#
  • Tries
    • 1.Bc6+?
      • 1...Sd5
        • 2.Bxd5#
      • 1...Sxc6!
    • 1.Bg6?
      • threat
        • 2.Bxf5#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Bg3!
  • Keys
    • 1.Rd3!
      • threat
        • 2.f3#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Rxf2
        • 2.Sxc3#
      • 1...Bxf2
        • 2.Sf6#
      • 1...Sxd3
        • 2.Bc6#
      • 1...fxg4
        • 2.Bg6#
      • 1...f3
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::S(C),XP(b)
    • R(a);N_GUARD,XP(A)::S(C),XP(b)
    • R(g);CHECK,XP(F)::S(C),XR(g)
    • B(f);N_GUARD,XP(A)::S(G)
    • B(f);N_GUARD::S(G),XB(f)
    • S(c);N_GUARD::B(H)
    • S(c);N_GUARD::B(H),XS(c)
    • P(i);OGATEB,XP(E)::B(H)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(H),XS(c)
      • Refutation
        • S(c);XB(H)
    • Try
      • B(H);P_PINP(i)
      • Threat
        • B(H),XP(i)
      • Vars
        • R(g);CHECK,XP(F)::S(C),XR(g)
      • Refutation
        • B(f);
  • Actual
    • R(B);
    • Threat
      • P(A)
    • Vars
      • R(g);CHECK,XP(F)::S(C),XR(g)
      • R(a);N_GUARD,XP(A)::S(C),XP(b)
      • B(f);N_GUARD,XP(A)::S(G)
      • S(c);N_GUARD,XR(B)::B(H)
      • P(i);OGATEB,XP(E)::B(H)
      • P(e);N_GUARD::R1(B)
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