MESON Chess Problem Database

Problem Display
PID: 222729 (8/1bRQ4/kB1b1R2/1r1N4/2r1P3/8/N1p5/5B1K w - - 0 1)

Anonymous

Chess Monthly, 1884

8/1bRQ4/kB1b1R2/1r1N4/2r1P3/8/N1p5/5B1K

#2

9 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Bxb5#
      • 2.Qxb5#
    • 1...Ra4
      • 2.Bxb5#
      • 2.Qxb5#
    • 1...Rd4
      • 2.Bxb5#
      • 2.Qxb5#
    • 1...Rxe4
      • 2.Bxb5#
      • 2.Qxb5#
    • 1...Rcc5
      • 2.Sab4#
    • 1...Rxc7
      • 2.Bxb5#
      • 2.Qxb5#
    • 1...Rb1
      • 2.Qa4#
    • 1...Rb2
      • 2.Qa4#
    • 1...Rb3
      • 2.Qa4#
    • 1...Rbc5
      • 2.Sab4#
    • 1...Rxb6
      • 2.Qa4#
    • 1...Bc6
      • 2.Ra7#
    • 1...Ba8
      • 2.Ra7#
    • 1...Bc8
      • 2.Ra7#
      • 2.Qxc8#
  • Tries
    • 1.Rxc4?
      • threat
        • 2.Ra4#
      • 1...Bxd5
        • 2.Qa7#
      • 1...Rb4
        • 2.Rxb4#
      • 1...Bb4
        • 2.Sc7#
      • 1...Rxd5!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qxb5#
      • 1...Rcxc5
        • 2.Sab4#
      • 1...Rbxc5
        • 2.Sab4#
      • 1...Rxb6
        • 2.Qa4#
      • 1...Bxc5
        • 2.Sc7#
      • 1...Bxd5
        • 2.Qa7#
      • 1...Rcb4
        • 2.Saxb4#
      • 1...Rb1
        • 2.Ra5#
        • 2.Qa4#
      • 1...Rb2
        • 2.Ra5#
        • 2.Qa4#
      • 1...Rb3
        • 2.Ra5#
        • 2.Qa4#
      • 1...Rbb4
        • 2.Saxb4#
        • 2.Ra5#
      • 1...Ra5
        • 2.Sab4#
        • 2.Rxa5#
      • 1...Bc6
        • 2.Qa7#
      • 1...Ba8
        • 2.Qa7#
      • 1...Bc8
        • 2.Qxc8#
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD,P_SPINR(c),S_CUTB(e)::S(C)
    • R(c);OGATE,P_PINB(A),P_SPINR(b)::QAR2(I)
    • R(c);OGATE,P_SPINR(b)::QAR2(I)
    • R(c);N_GUARD,P_SPINR(b),S_CUTB(e)::S(C)
    • R(c);OGATE,P_SPINR(b),XB(F)::QAR2(I)
    • B(f);OGATE::R1(H)
  • Tries
    • Try
      • R(H);XR(b)
      • Threat
        • R(H)
      • Vars
        • B(f);OGATE,P_PINP(D),XS(E)::QAR1(I)
        • R(c);OGATEB::B(A)+R(H),XR(c)
        • B(e);N_GUARD::S(E)
      • Refutation
        • R(c);XS(E)
  • Actual
    • R(H);
    • Threat
      • QAB1(I),XR(c)
    • Vars
      • R(b);N_GUARD,P_SPINR(c),XR(H)::S(C)
      • R(c);N_GUARD,P_SPINR(b),XR(H)::S(C)
      • R(c);OGATE,P_SPINR(b),XB(F)::QAR2(I)
      • B(e);N_GUARD,XR(H)::S(E)
      • B(f);OGATE,P_PINP(D),XS(E)::QAR1(I)
      • R(b);N_GUARD,P_SPINR(c)::S(C),XR(b)
      • B(f);OGATE::QAR1(I)
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