MESON Chess Problem Database

Problem Display
PID: 176446 (2R5/1B1p1Q1q/1N1pr2p/1k1N3R/4p3/Kp6/3B4/3n2r1 w - - 0 1)

Gross, Erwin

Schach-Echo, 1978

2R5/1B1p1Q1q/1N1pr2p/1k1N3R/4p3/Kp6/3B4/3n2r1

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qxd7#
    • 1...Qg6
      • 2.Qxd7#
    • 1...Qg8
      • 2.Qxd7#
    • 1...Qh8
      • 2.Qxd7#
    • 1...Rf1
      • 2.Qxf1#
    • 1...Rg4
      • 2.Qf1#
    • 1...Rg5
      • 2.Qf1#
    • 1...Rgg6
      • 2.Qf1#
    • 1...Rg7
      • 2.Qf1#
    • 1...Rg8
      • 2.Qf1#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sc3#
      • 1...Qf5
        • 2.Qxd7#
      • 1...Re5
        • 2.Sxd6#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Rg5!
    • 1.Sxd7?
      • threat
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Rg5
        • 2.Qf1#
      • 1...Re5
        • 2.Sc7#
      • 1...Qf5!
    • 1.Sa8?
      • threat
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Qf5
        • 2.Qxd7#
      • 1...Rg5
        • 2.Qf1#
      • 1...Re5!
    • 1.Rc6?
      • threat
        • 2.Sc3#
        • 2.Sc7#
      • 1...Sc3
        • 2.Sxc3#
        • 2.Sc7#
      • 1...Qf5
        • 2.Sc7#
      • 1...Rg5
        • 2.Sc7#
        • 2.Qf1#
      • 1...Re5
        • 2.Sc7#
      • 1...dxc6!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sdc3#
      • 1...Sc3
        • 2.Sdxc3#
      • 1...Qf5
        • 2.Qxd7#
      • 1...Rg5
        • 2.Qf1#
      • 1...Re5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(j);N_GUARD::QAB(G),XP(i)
    • R(b);N_GUARD::QAB(G),XR(b)
    • R(b);N_GUARD::QAB(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • R(D)+S(C),DCHECK
      • Vars
        • Q(j);N_GUARD::QAB(G),XP(i)
        • R(g);N_GUARD::S(E),XP(f)
        • S(a);::R(D)+S(C),DCHECK,XS(a)
      • Refutation
        • R(b);
    • Try
      • S(E);XP(i)
      • Threat
        • R(D)+S(C),DCHECK
      • Vars
        • S(a);::R(D)+S(C),DCHECK,XS(a)
        • R(b);N_GUARD::QAB(G)
        • R(g);::S(C)
      • Refutation
        • Q(j);
    • Try
      • S(E);
      • Threat
        • R(D)+S(C),DCHECK
      • Vars
        • S(a);::R(D)+S(C),DCHECK,XS(a)
        • Q(j);N_GUARD::QAB(G),XP(i)
        • R(b);N_GUARD::QAB(G)
      • Refutation
        • R(g);
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);::S(C)
        • R(g);::S(C)
      • Refutation
        • P(i);XR(H)
  • Actual
    • S(E);
    • Threat
      • R(D)+S(C),DCHECK
    • Vars
      • S(a);::R(D)+S(C),DCHECK,XS(a)
      • Q(j);N_GUARD::QAB(G),XP(i)
      • R(b);N_GUARD::QAB(G)
      • R(g);::S(C)
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