MESON Chess Problem Database

Problem Display
PID: 170021 (q7/3n1B2/8/4pkpN/Q3R3/8/p4P2/K6b w - - 0 1)

Solivella, Nicandro

Enroque!!, 1947

q7/3n1B2/8/4pkpN/Q3R3/8/p4P2/K6b

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxd7#
    • 1...Bxe4
      • 2.Qxd7#
    • 1...Sf6
      • 2.Sg3#
      • 2.Sg7#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Sg3#
        • 2.Sg7#
        • 2.Bg6#
        • 2.Qg6#
      • 1...Bxe4
        • 2.Qxd7#
        • 2.Qe6#
      • 1...g4
        • 2.Qg6#
      • 1...Qa3
        • 2.Sg7#
        • 2.Bg6#
        • 2.Qg6#
      • 1...Qa6
        • 2.Sg3#
        • 2.Sg7#
        • 2.Bg6#
      • 1...Qe8
        • 2.Sg3#
        • 2.Sg7#
        • 2.Qg6#
      • 1...Qf8
        • 2.Sg3#
        • 2.Bg6#
        • 2.Qg6#
      • 1...Qg8
        • 2.Sg3#
      • 1...Qh8
        • 2.Sg3#
        • 2.Bg6#
        • 2.Qg6#
      • 1...Sf6
        • 2.Sg3#
        • 2.Sg7#
      • 1...Sf8
        • 2.Sg3#
        • 2.Sg7#
      • 1...Qxc6!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qg4#
      • 1...Kxe4
        • 2.Bg6#
      • 1...Qxe4
        • 2.Qxd7#
      • 1...Bxe4
        • 2.Qxd7#
      • 1...g4
        • 2.Qxg4#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Sf6
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(g);SBLOCK,XR(D)::QAB(C),XS(f)
    • B(a);SBLOCK,XR(D)::QAB(C),XS(f)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • P(e);::QAB1(C)
        • Q(g);::S(E)
      • Refutation
        • Q(g);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(d);S_FLIGHT,XR(D)::B(F)
      • Q(g);SBLOCK,XR(D)::QAB(C),XS(f)
      • B(a);SBLOCK,XR(D)::QAB(C),XS(f)
      • P(e);::QAB1(C),XP(e)
      • B(a);N_GUARD::QAR2(C),XB(a)
      • S(f);SBLOCK::S(E)
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