MESON Chess Problem Database

Problem Display
PID: 114741 (4n3/1N2n2N/p7/4k2P/K2ppR2/8/B2BQ3/5r1b w - - 0 1)

Andersson, Sven Tore

Boletim da UBP, 1967

4n3/1N2n2N/p7/4k2P/K2ppR2/8/B2BQ3/5r1b

#2

8 + 8

6490 yacpdb 2009
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qxe4#
  • Tries
    • 1.Rxe4+?
      • 1...Kf5
        • 2.Be6#
        • 2.Re5#
        • 2.Qg4#
      • 1...Bxe4!
    • 1.Qg4?
      • threat
        • 2.Qe6#
      • 1...d3
        • 2.Bc3#
      • 1...Sd5
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sc7
        • 2.Qg7#
      • 1...Sg7
        • 2.Qxg7#
      • 1...e3!
    • 1.Qb5+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...axb5+!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qe6#
      • 1...Sd5
        • 2.Qxd5#
      • 1...e3
        • 2.Qxd4#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sg7
        • 2.Qc7#
      • 1...d3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);S_CUTB(b)::QAR1(C),XP(d)
  • Tries
    • Try
      • R(E);CHECK,XP(d)
      • Refutation
        • B(b);P_SPINB(b),XR(E)
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR1(C)
      • Vars
        • P(c);OGATEB::B(B)
        • S(g);N_GUARD::QAR1(C)
        • S(g);N_GUARD::QAR1(C),XS(g)
        • S(h);N_GUARD::QAB(C)
        • S(h);N_GUARD::QAB(C),XS(h)
      • Refutation
        • P(d);
    • Try
      • Q(C);CHECK,N_PINP(d)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(C),XS(g)
      • Refutation
        • P(f);CHECK,XQ(C)
  • Actual
    • Q(C);N_PINP(d)
    • Threat
      • QAR1(C)
    • Vars
      • S(g);N_GUARD::QAR1(C),XS(g)
      • P(d);::QAB1(C),XP(c)
      • S(h);N_GUARD::QAB(C),XS(h)
      • S(h);N_GUARD::QAB(C)
      • P(c);OGATEB::QAB(C)
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