MESON Chess Problem Database

Problem Display
PID: 247711 (2n5/1Q6/P1p5/1Nk1P3/5P2/Pp2p2b/1Kn1B1q1/2RR4 w - - 0 1)

Volkmann, Albert

1st HM., Stratford Express, 1950

2n5/1Q6/P1p5/1Nk1P3/5P2/Pp2p2b/1Kn1B1q1/2RR4

#2

10 + 8

14867 BCPS Library 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Qe7#
    • 1...Sd6
      • 2.Qa7#
    • 1...Sa7
      • 2.Qxa7#
    • 1...Se7
      • 2.Qa7#
    • 1...cxb5
      • 2.Qxb5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sa4#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Sd4
        • 2.Qb4#
      • 1...Sb6
        • 2.Qe7#
      • 1...Qxe2!
    • 1.Sd6?
      • threat
        • 2.Qb4#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Sb6!
    • 1.Sa7?
      • threat
        • 2.Qb4#
      • 1...Sb6
        • 2.Qe7#
      • 1...Qe4!
    • 1.Qa7+?
      • 1...Sb6
        • 2.Qe7#
      • 1...Sxa7!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sxb3#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Qxe2
        • 2.Qxc6#
      • 1...Qd5
        • 2.Qb4#
      • 1...Qg8
        • 2.Qxc6#
      • 1...Be6
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • S(h);N_GUARD,SBLOCK::QAB(J)
    • S(h);N_GUARD::QAB(J)
    • S(h);N_GUARD::QAB(J),XS(h)
    • P(g);OGATE,XS(G)::QAR1(J),XP(g)
  • Tries
    • Try
      • S(G);N_PINS(a)
      • Threat
        • S(G)
      • Vars
        • Q(b);N_GUARD::S(G),XQ(b)
        • S(a);N_GUARD,P_PINB(D)::QAB1(J)
        • S(h);N_GUARD,SBLOCK::QAB(J)
      • Refutation
        • Q(b);XB(D)
    • Try
      • S(G);
      • Threat
        • QAB1(J)
      • Vars
        • Q(b);N_GUARD::S(G),XQ(b)
      • Refutation
        • S(h);
    • Try
      • S(G);
      • Threat
        • QAB1(J)
      • Vars
        • S(h);N_GUARD,SBLOCK::QAB(J)
      • Refutation
        • Q(b);
    • Try
      • Q(J);CHECK
      • Vars
        • S(h);N_GUARD,SBLOCK::QAB(J)
      • Refutation
        • S(h);XQ(J)
  • Actual
    • S(G);
    • Threat
      • S(G),XP(c)
    • Vars
      • K(f);N_SPINS(a),P-FLIGHT,P_SPINP(g)::QAB1(J),XP(g)
      • Q(b);N_GUARD,XB(D)::QAR1(J),XP(g)
      • Q(b);SBLOCK::QAB1(J)
      • Q(b);N_GUARD::QAR1(J),XP(g)
      • B(e);N_GUARD::S(G),XB(e)
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