MESON Chess Problem Database

Problem Display
PID: 241184 (8/1R3p2/2np1bp1/3Nn2R/2k1K3/Pppp1p2/5B2/6Q1 w - - 0 1)

Heyl, Peter

Sachsische Zeitung, 2007

8/1R3p2/2np1bp1/3Nn2R/2k1K3/Pppp1p2/5B2/6Q1

#2

7 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Sb6#
    • 1...Sd7
      • 2.Se3#
    • 1...Sb4
      • 2.Rxb4#
    • 1...Sa5
      • 2.Rb4#
    • 1...Sa7
      • 2.Rb4#
    • 1...Se7
      • 2.Rb4#
    • 1...Sb8
      • 2.Rb4#
    • 1...Sd8
      • 2.Rb4#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Se3#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Sg4
        • 2.Sb6#
      • 1...Bg5!
    • 1.Qb1?
      • threat
        • 2.Qxb3#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sa5
        • 2.Rb4#
      • 1...b2
        • 2.Qa2#
      • 1...Sd4!
    • 1.Qc1?
      • threat
        • 2.Qxc3#
      • 1...Sg4
        • 2.Sb6#
      • 1...Sd7
        • 2.Se3#
      • 1...c2!
    • 1.Qe1?
      • threat
        • 2.Qxc3#
      • 1...Sg4
        • 2.Sb6#
      • 1...Sd7
        • 2.Se3#
      • 1...c2
        • 2.Qc3#
      • 1...d2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxc3#
      • 1...Sg4
        • 2.Sb6#
      • 1...Sd7
        • 2.Se3#
      • 1...b2
        • 2.Qa2#
      • 1...c2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(f);::S(E)
    • S(g);N_GUARD::R1(G),XS(g)
    • S(g);N_GUARD::R1(G)
  • Tries
    • Try
      • B(B);
      • Threat
        • S(E)
      • Vars
        • S(g);OGATE,XB(B)::QAR1(A),XS(g)
        • S(f);::S(E)
      • Refutation
        • B(i);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • S(g);N_GUARD::R1(G),XS(g)
        • S(g);N_GUARD::R1(G)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • S(g);
    • Try
      • Q(A);P_PINP(b)
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • S(f);::S(E)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • S(f);::S(E)
        • P(b);::QAR1(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • S(f);::S(E)
      • P(a);OGATEB::QAB(A)
      • P(b);::QAR1(A)
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