MESON Chess Problem Database

Problem Display
PID: 175804 (1Q6/n7/5p1K/2pN2R1/2kp4/r2N3R/2Prp3/2b1B3 w - - 0 1)

Noir, P

San Francisco Chronicle, 1898

1Q6/n7/5p1K/2pN2R1/2kp4/r2N3R/2Prp3/2b1B3

#2

8 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb3#
    • 1...Ra2
      • 2.Qb3#
    • 1...Rb3
      • 2.Qxb3#
      • 2.cxb3#
    • 1...Ra4
      • 2.Qb3#
    • 1...Ra5
      • 2.Qb3#
    • 1...Ra6
      • 2.Qb3#
    • 1...Bb2
      • 2.Sxb2#
  • Tries
    • 1.Se3+?
      • 1...Kc3
        • 2.Rxc5#
      • 1...dxe3!
    • 1.Sb6+?
      • 1...Kc3
        • 2.Rxc5#
      • 1...Kb5!
    • 1.Sc7?
      • threat
        • 2.Rxc5#
      • 1...Kc3
        • 2.Rxc5#
      • 1...Rxc2
        • 2.Qg8#
      • 1...Rdxd3
        • 2.Qg8#
      • 1...fxg5
        • 2.Se5#
      • 1...Rd1
        • 2.Qg8#
      • 1...Ra5
        • 2.Qb3#
      • 1...f5
        • 2.Se5#
      • 1...Raxd3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Rxc5#
      • 1...Kxc3
        • 2.Rxc5#
      • 1...Rxc2
        • 2.Qg8#
      • 1...Rxd3
        • 2.cxd3#
      • 1...dxc3
        • 2.Rh4#
      • 1...fxg5
        • 2.Se5#
      • 1...Rd1
        • 2.Qg8#
      • 1...Ra5
        • 2.Qb3#
      • 1...f5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::QAB1(H)
    • B(a);N_GUARD::S(C),XB(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINR(b)::R(F),XP(g)
      • Refutation
        • P(f);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINR(b)::R(F),XP(g)
      • Refutation
        • K(e);P_SPINP(g),S_FLIGHT
    • Try
      • S(E);
      • Threat
        • R1(F),XP(g)
      • Vars
        • K(e);P-FLIGHT,P_SPINR(b)::R(F),XP(g)
        • R(b);P_PINR(F),XP(B)::QAB(H)
        • R(b);P_PINR(F),XS(C)::QAB(H)
        • P(h);N_GUARD,XR(F)::S(C)
        • R(b);P_PINR(F)::QAB(H)
        • R(d);N_GUARD::QAB1(H)
        • P(h);N_GUARD::S(C)
      • Refutation
        • R(d);XS(C)
  • Actual
    • S(E);
    • Threat
      • R1(F),XP(g)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(b),XS(E)::R(F),XP(g)
      • R(b);P_PINR(F),XP(B)::QAB(H)
      • R(b);OGATE,P_PINR(F),XS(C)::P(B),XR(b)
      • P(f);OGATEB,SBLOCK,XS(E)::R(D)
      • P(h);N_GUARD,XR(F)::S(C)
      • R(b);P_PINR(F)::QAB(H)
      • R(d);N_GUARD::QAB1(H)
      • P(h);N_GUARD::S(C)
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