MESON Chess Problem Database

Problem Display
PID: 142156 (7b/3b4/B1pR4/2Pp2B1/2rN1Q1K/1nrk1P2/2np4/2R3N1 w - - 0 1)

Lepage, Roger

Europe Echecs, 1973

7b/3b4/B1pR4/2Pp2B1/2rN1Q1K/1nrk1P2/2np4/2R3N1

#2

10 + 10

23 Die Schwalbe 1974

SOLUTION

  • SOUND
  • Sets
    • 1...Sca1
      • 2.Qe3#
    • 1...Se1
      • 2.Qe3#
    • 1...Sa3
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sb4
      • 2.Qe3#
    • 1...Scxd4
      • 2.Qe3#
    • 1...Sba1
      • 2.Qxd2#
    • 1...Sxc1
      • 2.Qxd2#
    • 1...Sbxd4
      • 2.Qxd2#
    • 1...Sa5
      • 2.Qxd2#
    • 1...Sxc5
      • 2.Qxd2#
  • Tries
    • 1.Sxc2?
      • threat
        • 2.Sb4#
        • 2.Qe4#
      • 1...Sxc5
        • 2.Sb4#
      • 1...Bf5
        • 2.Sb4#
      • 1...Bd4
        • 2.Sb4#
      • 1...Sd4
        • 2.Sb4#
        • 2.Qxd2#
        • 2.Qe3#
      • 1...Rxc2!
    • 1.Sxb3?
      • threat
        • 2.Qe4#
      • 1...Rxb3
        • 2.Qxc4#
      • 1...Bd4
        • 2.Qxd2#
      • 1...Sd4
        • 2.Qxd2#
        • 2.Qe3#
      • 1...Bf5!
    • 1.Rxd5?
      • threat
        • 2.Qe4#
      • 1...Sxc5
        • 2.Qxd2#
      • 1...Bf5
        • 2.Qxf5#
      • 1...cxd5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qe4#
      • 1...Sxc5
        • 2.Sxc5#
      • 1...Bd4
        • 2.Qf5#
      • 1...Scd4
        • 2.Qe3#
      • 1...Sbd4
        • 2.Qxd2#

This is a version

Verion of a problem published in Die Schwalbe in 1973.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • S(a);N_GUARD::QAR1(E)
    • S(a);N_GUARD::QAR1(E),XS(a)
    • S(a);N_GUARD,XS(D)::QAR1(E)
    • S(c);N_GUARD::QAR1(E),XP(b)
    • S(c);N_GUARD,XR(A)::QAR1(E),XP(b)
    • S(c);N_GUARD,SBLOCK,XS(D)::QAR1(E),XP(b)
    • S(c);N_GUARD,XP(G)::QAR1(E),XP(b)
  • Tries
    • Try
      • S(D);P_PINP(g),P_SPINQ(E),XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XP(G)::S(D)
        • B(i);::S(D)
        • B(j);N_PINQ(E),N_SPINP(g)::S(D)
      • Refutation
        • R(d);XS(D)
    • Try
      • S(D);P_PINP(g),P_SPINQ(E),XS(c)
      • Threat
        • QAB1(E)
      • Vars
        • R(d);N_GUARD,XS(D)::QAB1(E),XR(f)
        • B(j);N_PINQ(E),N_SPINP(g)::QAR1(E),XP(b)
      • Refutation
        • B(i);
    • Try
      • R(J);XP(g)
      • Threat
        • QAB1(E)
      • Vars
        • S(c);N_GUARD,XP(G)::QAR1(E),XP(b)
        • B(i);N_GUARD::QAB(E),XB(i)
      • Refutation
        • P(h);XR(J)
  • Actual
    • S(D);P_PINP(g),P_SPINQ(E)
    • Threat
      • QAB1(E)
    • Vars
      • S(c);XP(G)::S(D),XS(c)
      • B(j);N_PINQ(E),N_SPINP(g)::QAB(E)
      • S(a);N_PINQ(E),N_SPINP(g)::QAR1(E)
      • S(c);N_PINQ(E),N_SPINP(g)::QAR1(E),XP(b)
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