MESON Chess Problem Database

Problem Display
PID: 73347 (4Q3/3P1P2/3PKB1p/2p2R2/2BPkp2/q3pr1N/n2r1PP1/1N3n2 w - - 0 1)

Gross, Erwin

Sachsische Zeitung, 1993

4Q3/3P1P2/3PKB1p/2p2R2/2BPkp2/q3pr1N/n2r1PP1/1N3n2

#2

13 + 10

6113 Problemschach-Jahrbuch (1993) 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qa8#
    • 1...Qc3
      • 2.Qa8#
    • 1...Qd3
      • 2.Bd5#
      • 2.Qa8#
    • 1...Qa8
      • 2.Qxa8#
    • 1...Rd3
      • 2.Bd5#
    • 1...Rxd4
      • 2.Re5#
    • 1...Rg3
      • 2.Rxf4#
    • 1...cxd4
      • 2.Re5#
    • 1...h5
      • 2.Sg5#
  • Tries
    • 1.Sc3+?
      • 1...Qxc3
        • 2.Qa8#
      • 1...Sxc3!
  • Keys
    • 1.fxe3!
      • threat
        • 2.Re5#
      • 1...Kxe3
        • 2.Kd5#
      • 1...Qxe3
        • 2.Qa8#
      • 1...Rxe3
        • 2.Rxf4#
      • 1...Sxe3
        • 2.Sxd2#
      • 1...fxe3
        • 2.gxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • Q(d);N_GUARD::QAB(M)
    • Q(d);N_GUARD::QAB(M),XQ(d)
    • R(c);SBLOCK::B(E)
    • R(c);SBLOCK,XP(F)::R1(G)
    • R(f);N_GUARD::R1(G),XP(h)
    • P(i);SBLOCK,XP(F)::R1(G)
    • P(j);N_GUARD::S(D)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • Q(d);XS(A)::QAB(M)
      • Refutation
        • S(b);XS(A)
  • Actual
    • P(B);XP(e)
    • Threat
      • R1(G)
    • Vars
      • K(g);P-FLIGHT,XP(B)::QAR(M)+K(I)
      • Q(d);N_GUARD,SBLOCK,XP(B)::QAB(M)
      • R(f);N_GUARD,SBLOCK,XP(B)::R1(G),XP(h)
      • S(a);N_GUARD,SBLOCK,XP(B)::S(A),XR(c)
      • P(h);SBLOCK,XP(B)::P(C),XR(f)
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