MESON Chess Problem Database

Problem Display
PID: 202834 (8/4N2Q/1b1PpK2/Rb3Np1/2pPk3/4Pp2/1n1R4/3n4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 2019

8/4N2Q/1b1PpK2/Rb3Np1/2pPk3/4Pp2/1n1R4/3n4

#2

9 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Re5#
    • 1...Ba6
      • 2.Re5#
    • 1...Bc6
      • 2.Re5#
    • 1...Bd7
      • 2.Re5#
    • 1...Be8
      • 2.Re5#
    • 1...Bxd4+
      • 2.Rxd4#
    • 1...f2
      • 2.Qh1#
  • Tries
    • 1.Qh2?
      • threat
        • 2.Qe5#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...f2
        • 2.Qh1#
        • 2.Qg2#
      • 1...e5
        • 2.Qxe5#
      • 1...Sd3!
    • 1.Qh4+?
      • 1...g4
        • 2.Qxg4#
      • 1...gxh4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sfe7#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Kxd5
        • 2.Qb7#
      • 1...Sxe3
        • 2.Sfxe3#
      • 1...exd5
        • 2.Qe7#
      • 1...exf5
        • 2.Qxf5#
      • 1...f2
        • 2.Qh1#
      • 1...Be8
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(f);OGATE::R1(D)
    • B(h);CHECK,OGATE,XP(C)::R1(A),XB(h)
    • P(c);OGATEB::QAB(I)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • B(h);CHECK,OGATE,XP(C)::R1(A),XB(h)
        • P(i);::QAR1(I),XP(i)
      • Refutation
        • S(b);
    • Try
      • Q(I);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAR2(I),XP(g)
      • Refutation
        • P(g);XQ(I)
  • Actual
    • S(H);
    • Threat
      • QAB(I)+S(E)
    • Vars
      • B(h);CHECK,OGATE,XP(C)::R1(A),XB(h)
      • K(e);OGATEB,P_SPINB(f),S_FLIGHT,XS(H)::QAB(I)
      • S(a);XP(B)::QAB(I)+S(E),XS(a)
      • P(i);OGATEB,SBLOCK,XS(H)::QAR(I)
      • P(i);OGATE,P_SPINP(i),XS(E)::QAB1(I),XP(i)
      • P(c);OGATEB::QAB(I)
      • B(f);::QAB(I)+S(E),DCHECK
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