MESON Chess Problem Database

Problem Display
PID: 214722 (qbQ1n3/p1n2r2/5P2/1Ppk1PN1/2Np4/3K4/8/8 w - - 0 1)

Rosenfield, F

Detroit Free Press, 1877

qbQ1n3/p1n2r2/5P2/1Ppk1PN1/2Np4/3K4/8/8

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxb7#
    • 1...Sxb5
      • 2.Qe6#
    • 1...Sa6
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sf4#
      • 1...Sxb5
        • 2.Qxc5#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Sa6!
    • 1.Qd7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rxd7!
    • 1.Qd8+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rd7!
  • Keys
    • 1.Sh3!
      • threat
        • 2.Sf4#
      • 1...Sxb5
        • 2.Qe6#
      • 1...Sa6
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(g);N_GUARD::QAB(G),XQ(g)
    • S(e);N_GUARD,XP(C)::QAB1(G)
    • S(e);N_GUARD::QAB1(G)
    • S(e);N_GUARD::QAB1(G),XS(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(e);OGATE,XP(C)::QAR1(G),XP(b)
        • S(e);OGATE,XS(E)::QAB1(G),XS(e)
      • Refutation
        • S(e);
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR1(G),XS(i)
      • Refutation
        • R(f);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR1(G),XS(i)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • S(e);N_GUARD,XP(C)::QAB1(G)
      • S(e);N_GUARD::QAB1(G)
      • S(e);N_GUARD::QAB1(G),XS(e)
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