MESON Chess Problem Database

Problem Display
PID: 261294 (2B4b/B1p1nN1K/5R1p/8/1n2kNp1/4P3/b1P1Q3/1r4q1 w - - 0 1)

Jaeger, Peter R

Neue Zurcher Zeitung, 1984

2B4b/B1p1nN1K/5R1p/8/1n2kNp1/4P3/b1P1Q3/1r4q1

#2

9 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Qxe3#
    • 1...Qc1
      • 2.Qg2#
    • 1...Qe1
      • 2.Qg2#
    • 1...Qg2
      • 2.Qxg2#
    • 1...Sd3
      • 2.cxd3#
    • 1...Sd5
      • 2.Bf5#
    • 1...Sf5
      • 2.Bxf5#
    • 1...Sc6
      • 2.Bf5#
    • 1...Sg6
      • 2.Bf5#
    • 1...Sg8
      • 2.Bf5#
  • Tries
    • 1.Sg5+?
      • 1...Ke5
        • 2.Bd4#
      • 1...hxg5!
    • 1.Sd6+?
      • 1...Ke5
        • 2.Bd4#
      • 1...cxd6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc3#
      • 1...Kxd5
        • 2.e4#
      • 1...Bxd5
        • 2.Rf4#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Sbxd5
        • 2.Qd3#
      • 1...Sexd5
        • 2.Bf5#
      • 1...Qe1
        • 2.Qg2#
      • 1...Rb3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • Q(b);OGATE,P_SPINQ(b),XP(C)::QAR1(B),XQ(b)
    • Q(b);N_GUARD::QAB(B)
    • Q(b);N_GUARD::QAB(B),XQ(b)
    • S(d);OGATE::P(A),XS(d)
    • S(i);N_GUARD::B(I)
    • S(i);N_GUARD::B(I),XS(i)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P-FLIGHT,S_CUTP(g)::B(F)
      • Refutation
        • P(g);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P-FLIGHT,S_CUTP(h)::B(F)
      • Refutation
        • P(h);XS(G)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(e);OGATE,S_FLIGHT,XS(D)::P(C)
      • B(c);SBLOCK,XS(D)::R1(E)
      • B(j);XR(E)::S(D),XB(j)
      • S(d);N_GUARD,XS(D)::QAB1(B)
      • S(i);N_GUARD,SBLOCK,XS(D)::B(I)
      • Q(b);N_GUARD::QAB(B)
      • R(a);S_CUTB(c)::QAR2(B)
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