MESON Chess Problem Database

Problem Display
PID: 216436 (1N1R4/Bp3ppP/3Rp1N1/1Ppq3b/1p1k2P1/5P1P/1P1KB2p/7Q w - 0 1)

Keym, Werner

Deutsche Schachzeitung, 1971

1N1R4/Bp3ppP/3Rp1N1/1Ppq3b/1p1k2P1/5P1P/1P1KB2p/7Q

#2

14 + 10

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Rxd6#
    • 1...e5
      • 2.Rxd5#
    • 1...b6
      • 2.Sc6#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...fxg6
        • 2.Qe4#
      • 1...f5
        • 2.Qd3#
      • 1...Bxg6!
    • 1.Qxh2?
      • threat
        • 2.Qg1#
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qf2#
      • 1...Qxd6
        • 2.Rxd6#
        • 2.Qe5#
        • 2.Qxd6#
      • 1...fxg6
        • 2.Qf4#
      • 1...e5
        • 2.Rxd5#
        • 2.Qg1#
        • 2.Qxe5#
        • 2.Qf2#
      • 1...f6
        • 2.Qg1#
        • 2.Qf4#
        • 2.Qf2#
      • 1...Bxg6!
  • Keys
    • 1.b3!
      • threat
        • 2.Qa1#
      • 1...Qxd6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(e);OGATE,XR(I)::R(N),XQ(e)
    • P(g);N_GUARD::R1(I),XQ(e)
    • P(h);N_GUARD,N_SPINP(d)::S(M)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(i);XS(J)::QAR1(A)
        • P(i);::QAR1(A)
      • Refutation
        • B(f);XS(J)
    • Try
      • Q(A);XP(a)
      • Threat
        • DUALS(4)
      • Vars
        • P(i);XS(J)::QAR2(A)
      • Refutation
        • B(f);XS(J)
  • Actual
    • P(B);
    • Threat
      • QAB(A)
    • Vars
      • Q(e);OGATE,XR(I)::R(N),XQ(e)
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