MESON Chess Problem Database

Problem Display
PID: 203651 (6Qn/6qB/1B1P4/1p2pr1N/1N2k3/7R/3rP1nK/3R4 w - - 0 1)

Sovs, GWH

Brisbane Courier, 1924

6Qn/6qB/1B1P4/1p2pr1N/1N2k3/7R/3rP1nK/3R4

#2

10 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Qxg2#
    • 1...Qh6
      • 2.Qxg2#
    • 1...Qf8
      • 2.Qxg2#
    • 1...Qa7
      • 2.Qxg2#
    • 1...Qb7
      • 2.Qxg2#
    • 1...Qc7
      • 2.Qxg2#
    • 1...Qd7
      • 2.Qxg2#
    • 1...Qe7
      • 2.Qxg2#
    • 1...Qf7
      • 2.Qxg2#
    • 1...Ra2
      • 2.Qd5#
    • 1...Rb2
      • 2.Qd5#
    • 1...Rc2
      • 2.Qd5#
    • 1...Rxe2
      • 2.Qd5#
    • 1...Rd3
      • 2.exd3#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Se1
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sf4
      • 2.Re3#
    • 1...Sh4
      • 2.Re3#
  • Tries
    • 1.Qxg7?
      • threat
        • 2.Qxg2#
      • 1...Rxe2
        • 2.Qb7#
      • 1...Rd3
        • 2.exd3#
      • 1...Se1
        • 2.Re3#
        • 2.Rh4#
        • 2.Qg4#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sf4
        • 2.Sg3#
        • 2.Sf6#
        • 2.Re3#
      • 1...Sh4
        • 2.Re3#
        • 2.Rxh4#
        • 2.Qg4#
      • 1...Sg6!
    • 1.Qa8+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...Qb7!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sf2#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Qxh7
        • 2.Sg3#
      • 1...Qxg8
        • 2.Sf6#
      • 1...Rxe2
        • 2.Sc5#
      • 1...Rxd3
        • 2.exd3#
      • 1...Qf7
        • 2.Qxg2#
      • 1...Sf7
        • 2.Qa8#
      • 1...Qg6
        • 2.Qa8#
      • 1...Sg6
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 16
  • Sets
    • Q(g);OGATE::QAB(J),XS(b)
    • R(a);N_GUARD::QAB1(J)
    • R(a);N_GUARD,XP(B)::QAB1(J)
    • R(a);OGATE::P(B),XR(a)
    • R(a);N_GUARD::QAB1(J),XR(a)
    • S(b);N_GUARD,P_PINP(B)::R1(D)
    • S(b);N_GUARD,P_PINP(B)::R1(D),XS(b)
  • Tries
    • Try
      • Q(J);XQ(g)
      • Threat
        • QAB(J),XS(b)
      • Vars
        • R(a);N_GUARD,XP(B)::QAB(J)
        • R(a);OGATE::P(B),XR(a)
        • S(b);N_GUARD,P_PINP(B)::R1(D),XS(b)
      • Refutation
        • S(h);N_SPINR(f)
    • Try
      • Q(J);CHECK
      • Vars
        • R(a);N_GUARD,N_SPINR(f),P_SPINR(a)::QAB1(J),XR(a)
      • Refutation
        • Q(g);P_SPINQ(g)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • Q(g);CHECK,N_GUARD::S(F),XQ(g)
      • Q(g);N_GUARD,N_SPINR(f),XB(I)::S(F)
      • Q(g);N_GUARD,XQ(J)::S(F)
      • R(a);XP(B)::S(E)
      • R(a);OGATE,XS(E)::P(B),XR(a)
      • Q(g);OGATE::QAB(J),XS(b)
      • S(h);S_CUTQ(g)::QAB(J)
      • Q(g);N_GUARD,N_SPINR(f)::QAB(J)
      • S(h);N_SPINR(f),S_CUTQ(g)::S(F)
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