MESON Chess Problem Database

Problem Display
PID: 164133 (4Kn2/4R1p1/1BRp4/N2k4/2p1p3/1bP4p/Qq1N1prr/3n3B w - - 0 1)

Ahues, Herbert Siegfried Oskar

2nd Comm., Best Problems, 2015

4Kn2/4R1p1/1BRp4/N2k4/2p1p3/1bP4p/Qq1N1prr/3n3B

#2

9 + 13

4901 Best Problems 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2
      • 2.Qxd2#
    • 1...Rg1
      • 2.Bxe4#
    • 1...Rg3
      • 2.Bxe4#
    • 1...Rg5
      • 2.Bxe4#
    • 1...Rg6
      • 2.Bxe4#
    • 1...Bc2
      • 2.Qxc4#
    • 1...Ba4
      • 2.Qxc4#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Rxd6#
      • 1...Qa3
        • 2.Qd2#
      • 1...Rg6
        • 2.Sf6#
      • 1...Ba4
        • 2.Qxc4#
      • 1...Se6!
    • 1.Qa3?
      • threat
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Se6
        • 2.Qxd6#
      • 1...Rg6
        • 2.Bxe4#
      • 1...Ba4
        • 2.Qxd6#
      • 1...Qxa3!
  • Keys
    • 1.Sdxc4!
      • threat
        • 2.Rxd6#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...Qa3
        • 2.Qd2#
      • 1...Rg6
        • 2.Bxe4#
      • 1...Ba4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(b);OGATE,XS(C)::QAR(B),XQ(b)
    • R(d);OGATE,P_SPINP(i)::B(A),XP(i)
    • B(f);OGATE,P_SPINP(h)::QAB1(B),XP(h)
    • B(f);OGATE,P_PINR(G),P_SPINP(h)::QAB1(B),XP(h)
  • Tries
    • Try
      • S(C);XP(i)
      • Threat
        • R1(G),XP(k)
      • Vars
        • Q(b);OGATE::QAR(B)
        • R(d);::B(A)+S(C),DCHECK
        • B(f);OGATE,P_PINR(G),P_SPINP(h)::QAB1(B),XP(h)
      • Refutation
        • S(m);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(m);::QAR1(B),XP(k)
        • R(d);OGATE,P_SPINP(i)::B(A),XP(i)
        • B(f);P_PINR(G)::QAR1(B),XP(k)
      • Refutation
        • Q(b);XQ(B)
  • Actual
    • S(C);XP(h)
    • Threat
      • R1(G),XP(k)
    • Vars
      • B(f);OGATE,P_SPINB(f),XS(C)::QAB1(B),XB(f)
      • Q(b);OGATE::QAR(B)
      • R(d);OGATE,P_SPINP(i)::B(A),XP(i)
      • B(f);P_PINR(G)::QAB(B)+S(C),DCHECK
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