MESON Chess Problem Database

Problem Display
PID: 20962 (8/4p2b/q1p1PB1p/1p3p1B/1Q2pk2/r7/3N1pRP/3NbK2 w - - 0 1)

Anderson, Gerald Frank

Natal Mercury, 1914

8/4p2b/q1p1PB1p/1p3p1B/1Q2pk2/r7/3N1pRP/3NbK2

#2

9 + 12

2740 Adventures of my Chessmen 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.hxg3#
    • 1...exf6
      • 2.Qd6#
  • Tries
    • 1.Rxf2+?
      • 1...Rf3
        • 2.Rxf3#
      • 1...Bxf2!
    • 1.Qc5?
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...exf6
        • 2.Qd6#
      • 1...Rg3
        • 2.Qe5#
        • 2.hxg3#
      • 1...b4+!
    • 1.Qd4?
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...exf6
        • 2.Qd6#
      • 1...Rg3
        • 2.Qe5#
        • 2.hxg3#
      • 1...b4+!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Be5#
      • 1...bxc4
        • 2.Qb8#
      • 1...exf6
        • 2.Qd6#
      • 1...e3
        • 2.Sd2#
      • 1...Rg3
        • 2.hxg3#
      • 1...Bc3
        • 2.Rxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE::P(E),XR(c)
    • P(k);N_GUARD,XB(I)::QAB(F)
  • Tries
    • Try
      • R(D);CHECK,XP(b)
      • Vars
        • R(c);N_GUARD,P_PINR(D),P_SPINR(c)::R1(D),XR(c)
      • Refutation
        • B(a);XR(D)
    • Try
      • Q(F);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(k);N_GUARD,XB(I)::QAB(F)
      • Refutation
        • P(f);CHECK
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(k);N_GUARD,XB(I)::QAB(F)
      • Refutation
        • P(f);CHECK
  • Actual
    • S(C);N_PINP(d)
    • Threat
      • B(I)
    • Vars
      • P(f);OGATE,XS(C)::QAB(F)
      • P(k);N_GUARD,XB(I)::QAB(F)
      • P(d);::QAR(F)+S(C)
      • R(c);OGATE::P(E),XR(c)
      • B(a);N_GUARD,S_CUTR(c)::R(D),XP(b)
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