MESON Chess Problem Database

Problem Display
PID: 97972 (2Rn4/4p1Nr/p2p3p/3k3K/Q1n2RN1/B6B/3r4/2q5 w - - 0 1)

Holladay, Edgar Dinwiddie

US Problem Bulletin, 1982

2Rn4/4p1Nr/p2p3p/3k3K/Q1n2RN1/B6B/3r4/2q5

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qxc4#
    • 1...Qxa3
      • 2.Qxc4#
    • 1...Qa1
      • 2.Qxc4#
    • 1...Qb1
      • 2.Qxc4#
    • 1...Qd1
      • 2.Qxc4#
    • 1...Qe1
      • 2.Qxc4#
    • 1...Qg1
      • 2.Qxc4#
    • 1...Qh1
      • 2.Qxc4#
    • 1...Rd1
      • 2.Bg2#
    • 1...Rg2
      • 2.Bxg2#
    • 1...Sb2
      • 2.Qe4#
    • 1...Sxa3
      • 2.Qe4#
    • 1...Se3
      • 2.Qe4#
    • 1...Sa5
      • 2.Qe4#
    • 1...Se5
      • 2.Se3#
      • 2.Qe4#
    • 1...Sb6
      • 2.Qe4#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Se6
      • 2.Qc6#
    • 1...Sb7
      • 2.Qc6#
    • 1...Sf7
      • 2.Qc6#
    • 1...a5
      • 2.Qb5#
    • 1...e5
      • 2.Sf6#
  • Tries
    • 1.Se3+?
      • 1...Sxe3
        • 2.Qe4#
      • 1...Ke5!
    • 1.Se6?
      • threat
        • 2.Sc7#
      • 1...Qxa3
        • 2.Qxc4#
      • 1...Sxa3
        • 2.Qe4#
      • 1...Sxe6
        • 2.Qc6#
      • 1...Sb2
        • 2.Qe4#
      • 1...Se3
        • 2.Qe4#
      • 1...Sa5
        • 2.Qe4#
      • 1...Se5
        • 2.Se3#
      • 1...Sb6
        • 2.Qe4#
      • 1...Kxe6!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sc7#
      • 1...Ke6
        • 2.Sc7#
      • 1...Qxa3
        • 2.Qxc4#
      • 1...Sxa3
        • 2.Qe4#
      • 1...Sb2
        • 2.Qe4#
      • 1...Se3
        • 2.Qe4#
      • 1...Sa5
        • 2.Qe4#
      • 1...Se5
        • 2.Se3#
      • 1...Sb6
        • 2.Qe4#
      • 1...Se6
        • 2.Qc6#
      • 1...e5
        • 2.Sgf6#
      • 1...e6
        • 2.Sef6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(a);N_GUARD::QAB1(C),XS(c)
    • Q(a);N_GUARD,XB(A)::QAB1(C),XS(c)
    • Q(a);N_GUARD,P_PINS(E)::QAB1(C),XS(c)
    • Q(a);N_GUARD,P_PINB(B)::QAB1(C),XS(c)
    • R(b);N_GUARD::B(B)
    • R(b);N_GUARD::B(B),XR(b)
    • S(c);OGATE::QAB1(C)
    • S(c);OGATE,XB(A)::QAB1(C)
    • S(j);N_GUARD::QAB1(C),XS(j)
    • S(j);N_GUARD::QAB1(C)
    • P(e);N_GUARD::QAR2(C)
    • P(h);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • S(c);OGATE,XS(E)::QAB1(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • Q(a);N_GUARD,XB(A)::QAB1(C),XS(c)
        • S(c);OGATE,XB(A)::QAB1(C)
        • S(j);N_GUARD,SBLOCK,XS(G)::QAB1(C)
        • S(c);OGATE::QAB1(C)
        • S(c);N_GUARD,SBLOCK::S(E)
      • Refutation
        • K(d);S_FLIGHT,XS(G)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);S_FLIGHT::S(G)
      • Q(a);N_GUARD,XB(A)::QAB1(C),XS(c)
      • S(c);OGATE,XB(A)::QAB1(C)
      • S(c);OGATE::QAB1(C)
      • S(c);N_GUARD,SBLOCK::S(E)
      • S(j);N_GUARD,SBLOCK::QAB1(C)
      • P(h);N_GUARD,SBLOCK::S(E)
      • P(h);N_GUARD,SBLOCK::S(G)
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