MESON Chess Problem Database

Problem Display
PID: 101154 (3QnN2/2p3p1/2P1r1p1/3pk1p1/6P1/4K3/2N5/2n5 w - - 0 1)

Nield, Joshua

Good Companions, 1920

3QnN2/2p3p1/2P1r1p1/3pk1p1/6P1/4K3/2N5/2n5

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qxg5#
    • 1...Re7
      • 2.Qxe7#
    • 1...Sd6
      • 2.Sd7#
    • 1...Sf6
      • 2.Sxg6#
    • 1...d4+
      • 2.Qxd4#
  • Tries
    • 1.Se1?
      • threat
        • 2.Sf3#
      • 1...d4+
        • 2.Qxd4#
      • 1...Re7
        • 2.Qxe7#
      • 1...Rf6!
    • 1.Sd4?
      • threat
        • 2.Sf3#
      • 1...Re7
        • 2.Qxe7#
      • 1...Rf6!
    • 1.Qxd5+?
      • 1...Kf6+
        • 2.Qxe6#
      • 1...Kxd5+!
  • Keys
    • 1.Sb4!
      • 1...d4+
        • 2.Qxd4#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...Re7
        • 2.Qxe7#
      • 1...Rf6
        • 2.Qxd5#
      • 1...Rd6
        • 2.Qxg5#
      • 1...Sa2
        • 2.Sd3#
      • 1...Se2
        • 2.Sd3#
      • 1...Sb3
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sd6
        • 2.Sd7#
      • 1...Sf6
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::QAR2(E),XP(d)
    • R(e);OGATEB::QAR2(E),XR(e)
    • S(i);SBLOCK::S(F)
    • S(i);S_CUTR(e)::S(F),XP(f)
    • P(b);CHECK,OGATE::QAB1(E),XP(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • P(b);CHECK,OGATE::QAB1(E),XP(b)
        • R(e);OGATEB::QAR2(E),XR(e)
      • Refutation
        • R(e);
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • R(e);OGATEB::QAR2(E),XR(e)
      • Refutation
        • R(e);
    • Try
      • Q(E);CHECK,XP(b)
      • Vars
        • K(c);CHECK,S_FLIGHT::QAR1(E),XR(e)
      • Refutation
        • K(c);CHECK,P-FLIGHT,XQ(E)
  • Actual
    • S(A);
    • Vars
      • P(b);CHECK,OGATE::QAB1(E),XP(b)
      • R(e);XP(D)::S(A),XR(e)
      • R(e);OGATEB::QAR2(E),XR(e)
      • R(e);SBLOCK::QAR1(E),XP(b)
      • R(e);SBLOCK::QAR2(E),XP(d)
      • S(a);N_GUARD::S(A)
      • S(a);N_GUARD::S(A),XS(a)
      • S(i);SBLOCK::S(F)
      • S(i);S_CUTR(e)::S(F),XP(f)
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