MESON Chess Problem Database

Problem Display
PID: 138716 (K1N5/2p5/4R3/1k6/3Q4/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

K1N5/2p5/4R3/1k6/3Q4/8/8/8

#2

4 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Re5+?
      • 1...Ka6
        • 2.Qa1#
        • 2.Qa7#
        • 2.Qd3#
        • 2.Qa4#
        • 2.Qc4#
      • 1...Kc6
        • 2.Sa7#
        • 2.Se7#
        • 2.Rc5#
        • 2.Qa4#
        • 2.Qd5#
      • 1...c5!
    • 1.Ra6?
      • 1...Kxa6
        • 2.Qa4#
      • 1...c5
        • 2.Qa4#
      • 1...c6!
    • 1.Rb6+?
      • 1...Ka5
        • 2.Qa1#
        • 2.Qb4#
      • 1...cxb6!
    • 1.Rc6?
      • 1...Kxc6
        • 2.Sa7#
      • 1...Ka5!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Re5#
      • 1...Kxa4!
    • 1.Qc4+?
      • 1...Ka5
        • 2.Ra6#
      • 1...Kxc4!
  • Keys
    • 1.Re4!
      • 1...Ka5
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
      • 1...Kc6
        • 2.Sa7#
      • 1...c5
        • 2.Qa4#
      • 1...c6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR2(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • R(B);CHECK
      • Refutation
        • P(b);XR(B)
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT,XR(B)::S(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • R(B);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::S(D)
      • P(b);SBLOCK::QAB1(A)
      • P(b);N_GUARD::QAR1(A)
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Developed and maintained by Brian Stephenson.
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