MESON Chess Problem Database

Problem Display
PID: 21751 (6Qn/1p2R3/1p5p/1B2Np2/3pkrnR/K7/5p1P/1b1N4 w - - 0 1)

Mansfield, Comins

Brisbane Daily Mail, 1921

6Qn/1p2R3/1p5p/1B2Np2/3pkrnR/K7/5p1P/1b1N4

#2

8 + 11

4797 A Genius of the Two-mover 1936
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3+
      • 2.Sd3#
    • 1...Ba2
      • 2.Bd3#
    • 1...Bd3
      • 2.Bxd3#
    • 1...Se3
      • 2.Sxf2#
    • 1...Sxe5
      • 2.Qg2#
    • 1...Sf6
      • 2.Qg2#
    • 1...d3
      • 2.Qc4#
  • Tries
    • 1.Sd3+?
      • 1...Se5
        • 2.Rxf4#
        • 2.Qg2#
      • 1...Kf3!
    • 1.Sf3+?
      • 1...Se5
        • 2.Sd2#
      • 1...Kxf3!
    • 1.Sc6+?
      • 1...Se5
        • 2.Qg2#
      • 1...Kf3!
    • 1.Sg6+?
      • 1...Se5
        • 2.Rxf4#
      • 1...Kf3!
    • 1.Sd7+?
      • 1...Se5
        • 2.Qg2#
      • 1...Kf3!
    • 1.Bc4?
      • threat
        • 2.Bd5#
        • 2.Qd5#
      • 1...Rf3+
        • 2.Sd3#
      • 1...Sxe5
        • 2.Qd5#
        • 2.Qg2#
      • 1...d3
        • 2.Qd5#
      • 1...Ba2
        • 2.Bd3#
        • 2.Qd5#
      • 1...Se3
        • 2.Sxf2#
      • 1...Sf6
        • 2.Qg2#
      • 1...Sf7!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Bxb7#
      • 1...Rf3+
        • 2.Sd3#
      • 1...Sxe5
        • 2.Qg2#
      • 1...bxa6
        • 2.Qa8#
      • 1...d3
        • 2.Qc4#
      • 1...Ba2
        • 2.Bd3#
      • 1...Se3
        • 2.Sxf2#
      • 1...Sf6
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(e);CHECK,P_SPINS(f),SBLOCK::R(G)+S(F)
    • B(a);N_GUARD::B(E)
    • B(a);N_GUARD::B(E),XB(a)
    • S(f);N_GUARD,P_SPINR(e),SBLOCK::S(A),XP(b)
    • S(f);OGATE,P_SPINR(e),P_SPINS(f),XS(F)::QAB(H)
    • S(f);OGATE,P_SPINR(e)::QAB(H)
    • P(c);OGATEB::QAR2(H)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • S(f);P_SPINR(e),P_SPINS(f)::S(F)
      • Refutation
        • K(d);S_FLIGHT,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • S(f);OGATE,P_SPINR(e),P_SPINS(f)::QAB(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • S(f);OGATE,P_SPINR(e),P_SPINS(f)::R1(D),XR(e)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • S(f);OGATE,P_SPINR(e),P_SPINS(f)::QAB(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,P_SPINS(f),SBLOCK::R(G)+S(F)
        • P(c);::QAB1(H)
        • S(f);N_GUARD,P_SPINR(e),SBLOCK::S(A),XP(b)
        • S(f);OGATE,P_SPINR(e)::QAB(H)
      • Refutation
        • S(k);
  • Actual
    • B(E);
    • Threat
      • B(E),XP(j)
    • Vars
      • R(e);CHECK,P_SPINS(f),SBLOCK::R(G)+S(F)
      • S(f);OGATE,P_SPINR(e),P_SPINS(f),XS(F)::QAB(H)
      • P(j);OGATEB,XB(E)::QAB(H)
      • P(c);OGATEB::QAR2(H)
      • B(a);N_GUARD::B(E)
      • S(f);N_GUARD,P_SPINR(e),SBLOCK::S(A),XP(b)
      • S(f);OGATE,P_SPINR(e)::QAB(H)
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