MESON Chess Problem Database

Problem Display
PID: 173176 (rN3K1k/7P/8/8/8/2N5/PR5R/B6r w - - 0 1)

Morse, Christopher Jeremy

Problem Observer, 1977

rN3K1k/7P/8/8/8/2N5/PR5R/B6r

#2

8 + 3

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd1?
      • threat
        • 2.Rb1#
        • 2.Rbc2#
        • 2.Rbd2#
        • 2.Rbe2#
        • 2.Rbf2#
        • 2.Rbg2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rb7#
      • 1...Rf1+
        • 2.Rbf2#
      • 1...Rxb8+
        • 2.Rxb8#
      • 1...Rxh2
        • 2.Rxh2#
      • 1...Rxa2
        • 2.Rxa2#
      • 1...Re1
        • 2.Rbe2#
      • 1...Rg1
        • 2.Rbg2#
      • 1...Ra3
        • 2.Rb3#
      • 1...Ra4
        • 2.Rb4#
      • 1...Ra5
        • 2.Rb5#
      • 1...Ra6
        • 2.Rb6#
      • 1...Ra7
        • 2.Rb7#
      • 1...Rxd1!
  • Keys
    • 1.Sb1!
      • threat
        • 2.Rbc2#
        • 2.Rbd2#
        • 2.Rbe2#
        • 2.Rbf2#
        • 2.Rbg2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rb7#
      • 1...Rf1+
        • 2.Rbf2#
      • 1...Rxb8+
        • 2.Rxb8#
      • 1...Rxb1
        • 2.Rxb1#
      • 1...Rxh2
        • 2.Rxh2#
      • 1...Rxa2
        • 2.Rxa2#
      • 1...Rc1
        • 2.Rbc2#
      • 1...Rd1
        • 2.Rbd2#
      • 1...Re1
        • 2.Rbe2#
      • 1...Rg1
        • 2.Rbg2#
      • 1...Ra3
        • 2.Rb3#
      • 1...Ra4
        • 2.Rb4#
      • 1...Ra5
        • 2.Rb5#
      • 1...Ra6
        • 2.Rb6#
      • 1...Ra7
        • 2.Rb7#

Anticipated by 2655(0000), 155733(1928)

This is a version of 173175

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(11)
      • Vars
        • R(a);CHECK::B(A)+R(C)
        • R(b);CHECK,OGATE,XS(G)::B(A)+R(C),XR(b)
        • R(a);OGATE,XR(D)::B(A)+R(C),XR(a)
        • R(b);N_PINS(G),OGATE,XP(B)::B(A)+R(C),XR(b)
        • R(a);::B(A)+R(C)
        • R(b);N_PINS(G)::B(A)+R(C)
      • Refutation
        • R(a);XS(E)
  • Actual
    • S(E);
    • Threat
      • DUALS(10)
    • Vars
      • R(a);CHECK::B(A)+R(C)
      • R(b);CHECK,OGATE,XS(G)::B(A)+R(C),XR(b)
      • R(a);OGATE,XS(E)::B(A)+R(C),XR(a)
      • R(a);OGATE,XR(D)::B(A)+R(C),XR(a)
      • R(b);N_PINS(G),OGATE,XP(B)::B(A)+R(C),XR(b)
      • R(a);::B(A)+R(C)
      • R(b);N_PINS(G)::B(A)+R(C)
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