MESON Chess Problem Database

Problem Display
PID: 81904 (B7/B1nRQ2P/2r1n2K/1q4p1/2N1k1P1/3Nb3/4P3/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Prize, Mitteldeutsche Zeitung, 1939

B7/B1nRQ2P/2r1n2K/1q4p1/2N1k1P1/3Nb3/4P3/8

#2

10 + 7

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Rd4#
    • 1...Bg1
      • 2.Sd2#
    • 1...Bd2
      • 2.Sxd2#
      • 2.Rd4#
    • 1...Bf2
      • 2.Sd2#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Bf4
      • 2.Sf2#
      • 2.Rd4#
  • Tries
    • 1.Bxe3?
      • threat
        • 2.Sf2#
        • 2.Rd4#
      • 1...Qb2
        • 2.Sf2#
        • 2.Sc5#
      • 1...Qc5
        • 2.Sf2#
        • 2.Sxc5#
      • 1...Qd5
        • 2.Sf2#
      • 1...Qe5
        • 2.Sf2#
      • 1...Qf5
        • 2.Rd4#
      • 1...Qb6
        • 2.Sf2#
      • 1...Sd5
        • 2.Sf2#
      • 1...Qxc4!
    • 1.Bxc6+?
      • 1...Qd5
        • 2.Sd6#
      • 1...Sd5
        • 2.Sd6#
        • 2.Qxe6#
      • 1...Qxc6!
    • 1.Qxe6+?
      • 1...Qe5
        • 2.Sd6#
      • 1...Sxe6!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qf3#
      • 1...Sd4+
        • 2.Sd6#
      • 1...Sf4+
        • 2.Sd6#
      • 1...Sc5+
        • 2.Qg6#
      • 1...Sg7+
        • 2.Sd6#
      • 1...Sd8+
        • 2.Sd6#
      • 1...Sf8+
        • 2.Sd6#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Bf4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::R1(G)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::R1(G),XB(a)
  • Tries
    • Try
      • B(F);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_SPINR(e)::S(B)
        • Q(c);N_SPINS(f)::S(B)
        • Q(c);::R1(G)
        • Q(c);::S(B)
        • S(g);N_SPINR(e)::S(B)
      • Refutation
        • Q(c);XS(C)
    • Try
      • B(J);CHECK,XR(e)
      • Vars
        • Q(c);P_SPINQ(c)::S(C)
      • Refutation
        • Q(c);XB(J)
    • Try
      • Q(H);CHECK,P_SPINQ(H),XS(f)
      • Vars
        • Q(c);P_SPINQ(c)::S(C)
      • Refutation
        • S(g);XQ(H)
  • Actual
    • Q(H);N_PINS(f)
    • Threat
      • QAB1(H)
    • Vars
      • S(f);CHECK::S(C)
      • S(f);CHECK,S_CUTQ(c)::QAB(H)
      • Q(c);N_GUARD::QAB1(H),XQ(c)
      • B(a);N_GUARD::S(B)
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