MESON Chess Problem Database

Problem Display
PID: 195132 (3k1qnQ/R1p1ppN1/1N2p3/r3p3/p4B2/8/K7/8 w - - 0 1)

McIlvane, John A

Pittsburgh Gazette-Times, 1918

3k1qnQ/R1p1ppN1/1N2p3/r3p3/p4B2/8/K7/8

#2

6 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Ra8#
    • 1...Rc5
      • 2.Ra8#
    • 1...Rd5
      • 2.Ra8#
    • 1...Sh6
      • 2.Qxf8#
    • 1...e4
      • 2.Bxc7#
    • 1...c5
      • 2.Rd7#
    • 1...c6
      • 2.Rd7#
  • Tries
    • 1.Rxc7?
      • threat
        • 2.Rd7#
        • 2.Rc8#
      • 1...Qxg7
        • 2.Rc8#
      • 1...Qe8
        • 2.Rc8#
      • 1...Rc5
        • 2.Rd7#
      • 1...Rd5
        • 2.Rc8#
      • 1...Ra7
        • 2.Rc8#
      • 1...Ra8
        • 2.Rd7#
      • 1...Sf6
        • 2.Rc8#
      • 1...Kxc7!
    • 1.Qxg8?
      • threat
        • 2.Qxf8#
      • 1...Qe8
        • 2.Qxe8#
      • 1...Qxg8!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qa8#
      • 1...Rxa7
        • 2.Qd1#
      • 1...Rd5
        • 2.Ra8#
      • 1...e4
        • 2.Bxc7#
      • 1...c6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::R(D)
    • S(j);OGATE,P_SPINQ(i)::QAR2(F),XQ(i)
    • P(c);OGATE::B(B),XP(e)
    • P(e);OGATE::R1(D)
  • Tries
    • Try
      • R(D);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);P_SPINS(j),XS(E)::R1(D)
        • Q(i);::R1(D)
        • R(b);::R1(D)
        • S(j);P_SPINQ(i)::R1(D)
      • Refutation
        • K(h);P_SPINP(c),S_FLIGHT,XR(D)
    • Try
      • Q(F);P_PINQ(i),XS(j)
      • Threat
        • QAR2(F),XQ(i)
      • Vars
        • Q(i);OGATE::QAR1(F),XQ(i)
      • Refutation
        • Q(i);N_SPINQ(i),XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • R(b);N_GUARD,XR(D)::QAB(F)
      • R(b);N_GUARD::R(D)
      • P(c);OGATE::B(B),XP(e)
      • P(e);OGATE::R1(D)
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