MESON Chess Problem Database

Problem Display
PID: 233176 (bR1R2B1/Nnp1p1Q1/3p1P2/P1k1b3/2pr4/2B1P1r1/5Np1/5nK1 w - - 0 1)

Ernst, Erich

Freie Presse, 1998

bR1R2B1/Nnp1p1Q1/3p1P2/P1k1b3/2pr4/2B1P1r1/5Np1/5nK1

#2

11 + 12

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Se4#
    • 1...Rd2
      • 2.Se4#
    • 1...Rd3
      • 2.Se4#
    • 1...Re4
      • 2.Sxe4#
    • 1...Rd5
      • 2.Se4#
    • 1...Bf4
      • 2.exd4#
    • 1...Sxa5
      • 2.Bb4#
      • 2.Rb5#
    • 1...Sxd8
      • 2.Bb4#
      • 2.Rb5#
    • 1...exf6
      • 2.Qxc7#
  • Tries
    • 1.Rxb7?
      • threat
        • 2.Bb4#
        • 2.Rb5#
      • 1...e6
        • 2.Rb5#
      • 1...c6
        • 2.Bb4#
      • 1...Bxb7!
  • Keys
    • 1.Rxd6!
      • threat
        • 2.Rc6#
      • 1...Kxd6
        • 2.Qxe7#
      • 1...Rxd6
        • 2.Se4#
      • 1...Bxd6
        • 2.exd4#
      • 1...Sxa5
        • 2.Bb4#
      • 1...Sxd6
        • 2.Bb4#
      • 1...cxd6
        • 2.Rc8#
      • 1...exd6
        • 2.Qxc7#
      • 1...Sd8
        • 2.Bb4#
      • 1...c6
        • 2.Rxc6#
      • 1...e6
        • 2.Qxc7#

Anticipated by 219226(1996)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 7
  • Sets
    • R(e);N_GUARD::S(B)
    • R(e);N_GUARD::S(B),XR(e)
    • B(g);N_GUARD::P(D),XR(e)
    • P(k);OGATE,XP(F)::QAR2(H),XP(j)
  • Tries
    • Try
      • R(I);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • P(k);::R1(I)
        • P(j);::B(C)
      • Refutation
        • B(l);XR(I)
  • Actual
    • R(J);XP(h)
    • Threat
      • R1(J)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XR(J)::QAB1(H),XP(k)
      • R(e);N_GUARD,XR(J)::S(B)
      • B(g);N_GUARD,SBLOCK,XR(J)::P(D),XR(e)
      • S(i);XP(E)::B(C)
      • S(i);SBLOCK,XR(J)::B(C)
      • P(j);OGATEB,SBLOCK,XR(J)::R(I)
      • P(k);OGATE,XR(J)::QAR2(H),XP(j)
      • S(i);::B(C)
      • P(j);::R1(J),XP(j)
      • P(k);OGATE::QAR2(H),XP(j)
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