MESON Chess Problem Database

Problem Display
PID: 21028 (Q2b4/8/2r1N1Kn/p1pPp3/2P1k1nR/4P3/4Ppqp/5NrB w - - 0 1)

Goethart, Gerhardus Hendrik

2nd Prize, Hampshire Post, 1915

Q2b4/8/2r1N1Kn/p1pPp3/2P1k1nR/4P3/4Ppqp/5NrB

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Bxf3#
    • 1...Rxe6+
      • 2.dxe6#
    • 1...Sf5
      • 2.Rxg4#
    • 1...Sf7
      • 2.Rxg4#
    • 1...Sg8
      • 2.Rxg4#
  • Tries
    • 1.Qxc6?
      • threat
        • 2.Sxc5#
        • 2.d6#
      • 1...Bb6
        • 2.Sg5#
        • 2.d6#
      • 1...Be7
        • 2.d6#
      • 1...Rxf1!
    • 1.dxc6?
      • threat
        • 2.Sxc5#
        • 2.c7#
      • 1...Bb6
        • 2.Sg5#
        • 2.c7#
      • 1...Bc7
        • 2.Sxc5#
        • 2.Sg5#
      • 1...Be7
        • 2.c7#
      • 1...Rxf1!
    • 1.d6?
      • threat
        • 2.Sxc5#
        • 2.Qxc6#
      • 1...Bb6
        • 2.Sg5#
        • 2.Qxc6#
      • 1...Rxf1!
  • Keys
    • 1.Rh3!
      • threat
        • 2.Sd2#
      • 1...Rxe6+
        • 2.dxe6#
      • 1...Sxe3+
        • 2.Sg3#
      • 1...Sf6+
        • 2.Sg5#
      • 1...Rxf1
        • 2.Bxg2#
      • 1...Qf3
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(c);OGATE::B(B),XQ(c)
    • R(j);CHECK,OGATE,XS(H)::QAB(J)+P(G),XR(j)
    • S(k);N_GUARD::R(F),XS(f)
  • Tries
    • Try
      • Q(J);N_SPINS(H),XR(j)
      • Threat
        • DUALS(2)
      • Vars
        • B(l);::QAB(J)+P(G)
      • Refutation
        • R(a);XS(A)
    • Try
      • P(G);N_SPINS(H),XR(j)
      • Threat
        • DUALS(2)
      • Vars
        • B(l);::QAB(J)+P(G)
      • Refutation
        • R(a);XS(A)
    • Try
      • P(G);N_SPINS(H),P_PINR(j)
      • Threat
        • DUALS(2)
      • Refutation
        • R(a);XS(A)
  • Actual
    • R(F);N_PINS(f)
    • Threat
      • S(A)
    • Vars
      • R(j);CHECK,OGATE,XS(H)::QAB(J)+P(G),XR(j)
      • S(f);CHECK,SBLOCK,XP(D)::S(A)
      • S(f);CHECK,N_PINS(H)::S(H)
      • R(a);N_GUARD,XS(A)::B(B),XQ(c)
      • Q(c);OGATE::B(B),XQ(c)
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