MESON Chess Problem Database

Problem Display
PID: 234185 (8/7p/2bKQ1n1/2pnp3/4k2p/1R4P1/q2RNBPb/2r5 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Berliner Morgenpost, 1964

8/7p/2bKQ1n1/2pnp3/4k2p/1R4P1/q2RNBPb/2r5

#2

8 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Rxe3#
    • 1...Sb4
      • 2.Re3#
    • 1...Sdf4
      • 2.Re3#
    • 1...Sb6
      • 2.Re3#
    • 1...Sf6
      • 2.Re3#
    • 1...Sc7
      • 2.Re3#
    • 1...Sde7
      • 2.Re3#
    • 1...Sgf4
      • 2.Qxe5#
    • 1...Sge7
      • 2.Qxe5#
    • 1...Sf8
      • 2.Qxe5#
    • 1...Sh8
      • 2.Qxe5#
    • 1...c4
      • 2.Rd4#
    • 1...h5
      • 2.Qxg6#
    • 1...h6
      • 2.Qxg6#
  • Tries
    • 1.Rf3?
      • threat
        • 2.Qf5#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sdf4
        • 2.Re3#
      • 1...Sde7
        • 2.Re3#
      • 1...Sgf4
        • 2.Qxe5#
      • 1...Sge7
        • 2.Qxe5#
      • 1...Bd7!
    • 1.Qg4+?
      • 1...Sdf4
        • 2.Re3#
      • 1...Sgf4!
    • 1.g4?
      • threat
        • 2.Qf5#
      • 1...Bd7
        • 2.Qxd5#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sde7
        • 2.Re3#
      • 1...Sge7!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf5#
      • 1...cxd4
        • 2.Rxd4#
      • 1...Bd7
        • 2.Qxd5#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sde7
        • 2.Re3#
      • 1...Sge7
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • S(g);N_GUARD::R1(E),XS(g)
    • S(g);N_GUARD::R1(E)
    • S(j);N_GUARD::QAR1(H),XP(h)
    • P(f);N_GUARD::R1(A)
    • P(k);N_GUARD::QAB(H),XS(j)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAB1(H)
      • Vars
        • S(g);N_GUARD::R1(E),XS(g)
        • S(g);N_GUARD::R1(E)
        • S(j);N_GUARD::QAR1(H),XP(h)
      • Refutation
        • B(i);
    • Try
      • Q(H);CHECK,N_PINP(h)
      • Vars
        • S(g);P_SPINS(g)::R1(E)
      • Refutation
        • S(j);P_SPINS(j)
    • Try
      • P(F);
      • Threat
        • QAB1(H)
      • Vars
        • B(i);N_GUARD::QAB1(H),XS(g)
        • S(g);N_GUARD::R1(E),XS(g)
        • S(g);N_GUARD::R1(E)
      • Refutation
        • S(j);
  • Actual
    • S(B);
    • Threat
      • QAB1(H)
    • Vars
      • P(f);OGATE,XS(B)::R1(A),XP(f)
      • B(i);N_GUARD::QAB1(H),XS(g)
      • S(g);N_GUARD::R1(E),XS(g)
      • S(g);N_GUARD::R1(E)
      • S(j);N_GUARD::QAR1(H),XP(h)
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