MESON Chess Problem Database

Problem Display
PID: 96966 (8/8/3N4/2pQ2p1/2pp2K1/3k4/7R/6n1 w - - 0 1)

McIntyre, Donald Glenoe

Problems For My Friends, 1957

8/8/3N4/2pQ2p1/2pp2K1/3k4/7R/6n1

#2

4 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qxc4#
    • 1...Ke3
      • 2.Qe4#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sh3
      • 2.Qf3#
    • 1...c3
      • 2.Qe4#
  • Tries
    • 1.Rb2?
      • 1...Ke3
        • 2.Qe4#
      • 1...Se2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qf3#
      • 1...c3
        • 2.Qe4#
      • 1...Kc3!
    • 1.Rc2?
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qe4#
      • 1...Kxc2!
    • 1.Rg2?
      • 1...Kc3
        • 2.Qxc4#
      • 1...Ke3
        • 2.Qe4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qf3#
      • 1...c3
        • 2.Qe4#
      • 1...Se2!
    • 1.Qa8?
      • 1...Kc3
        • 2.Qa3#
      • 1...Ke3
        • 2.Qe4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qf3#
      • 1...c3
        • 2.Qe4#
      • 1...Se2!
    • 1.Qf5+?
      • 1...Ke3
        • 2.Sxc4#
        • 2.Qe4#
      • 1...Kc3!
  • Keys
    • 1.Ra2!
      • 1...Kc3
        • 2.Qxc4#
      • 1...Ke3
        • 2.Qe4#
      • 1...Se2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qf3#
      • 1...c3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(d),P-FLIGHT::QAR1(C),XP(c)
    • K(b);N_SPINP(d),P-FLIGHT::QAR1(C)
    • S(a);N_GUARD::QAR2(C),XS(a)
    • S(a);N_GUARD::QAR2(C)
    • P(c);SBLOCK::QAB1(C)
  • Tries
    • Try
      • R(A);
      • Vars
        • K(b);N_SPINP(d),P-FLIGHT::QAR1(C)
        • S(a);N_GUARD::QAR2(C)
        • S(a);N_GUARD::QAR2(C),XS(a)
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • K(b);N_SPINP(d),P-FLIGHT
    • Try
      • R(A);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);N_SPINP(d),P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINP(d),S_FLIGHT,XR(A)
    • Try
      • R(A);
      • Vars
        • K(b);N_SPINP(d),P-FLIGHT::QAR1(C),XP(c)
        • K(b);N_SPINP(d),P-FLIGHT::QAR1(C)
        • S(a);N_GUARD::QAR2(C),XS(a)
        • S(a);N_GUARD::QAR2(C)
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);N_PINP(d)
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • K(b);P-FLIGHT::QAR1(C)
        • S(a);N_GUARD::QAR2(C),XS(a)
        • S(a);N_GUARD::QAR2(C)
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK,N_PINP(d)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(b);N_SPINP(d),P-FLIGHT::QAR1(C),XP(c)
      • K(b);N_SPINP(d),P-FLIGHT::QAR1(C)
      • S(a);N_GUARD::QAR2(C)
      • S(a);N_GUARD::QAR2(C),XS(a)
      • P(c);SBLOCK::QAB1(C)
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