MESON Chess Problem Database

Problem Display
PID: 82029 (8/6q1/2bPN1R1/1p1k1PPp/2rNn2K/1B2Q3/7B/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

De Maasbode, 1938

8/6q1/2bPN1R1/1p1k1PPp/2rNn2K/1B2Q3/7B/8

#2

10 + 7

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Qxd4#
    • 1...Sc5
      • 2.Sf4#
    • 1...Sf6
      • 2.Qe5#
  • Tries
    • 1.Sf4+?
      • 1...Ke5
        • 2.Re6#
      • 1...Kc5!
    • 1.Bxc4+?
      • 1...Kxc4
        • 2.Qb3#
      • 1...bxc4!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sb4#
      • 1...Sd2+
        • 2.Sf4#
      • 1...Sf2+
        • 2.Sf4#
      • 1...Sc3+
        • 2.Sf4#
      • 1...Sg3+
        • 2.Sf4#
      • 1...Sc5+
        • 2.Sf4#
      • 1...Sxg5+
        • 2.Sf4#
      • 1...Sxd6+
        • 2.Sf4#
      • 1...Sf6+
        • 2.Qd4#
      • 1...Qe5
        • 2.Sc7#
      • 1...Qc3
        • 2.Sc7#
      • 1...b4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • Q(g);OGATE,XS(D)::QAR1(C),XQ(g)
    • S(b);P_PINS(D),SBLOCK::S(I)
    • S(b);OGATE,P_PINS(D)::QAR1(C)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(d);N_SPINR(a),P-FLIGHT,P_SPINS(b)::R1(J)
      • Refutation
        • K(d);N_SPINR(a),P-FLIGHT
    • Try
      • B(B);CHECK,XR(a)
      • Vars
        • K(d);S_FLIGHT,XB(B)::QAB1(C)
      • Refutation
        • P(c);XB(B)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(b);CHECK::S(I)
      • S(b);CHECK,XP(G)::S(I)
      • S(b);CHECK,XP(H)::S(I)
      • S(b);CHECK,S_CUTQ(g)::QAR1(C)
      • Q(g);N_GUARD::S(I)
      • P(c);::S(D),XP(c)
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