MESON Chess Problem Database

Problem Display
PID: 6715 (6B1/3p1K2/rp6/p2R4/N1k4n/3R4/prp1Qn2/bb2B3 w - - 0 1)

Hersom, Donald H

1st Prize, BCPS, 1933

6B1/3p1K2/rp6/p2R4/N1k4n/3R4/prp1Qn2/bb2B3

#2

7 + 12

249 Schach-Echo 1933

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.R3d4#
    • 1...Sd1
      • 2.Qg4#
      • 2.Qe4#
    • 1...Sh1
      • 2.Qg4#
      • 2.Qe4#
    • 1...Sxd3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sg4
      • 2.Qxg4#
      • 2.Qe4#
    • 1...b5
      • 2.R5d4#
      • 2.Rc5#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Rc5#
      • 1...Rb3+
        • 2.R3d4#
      • 1...Rb4+
        • 2.Rc3#
      • 1...Rb5+
        • 2.R5d4#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sf5+!
    • 1.Ke8?
      • threat
        • 2.Rc5#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Ra8+!
    • 1.Rd1+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kb3!
    • 1.Ra3+?
      • 1...Sd3
        • 2.Qxd3#
        • 2.Qe4#
      • 1...Kxd5!
    • 1.Rc3+?
      • 1...Kb4
        • 2.Rd4#
        • 2.Qc4#
        • 2.Qb5#
      • 1...Kxd5!
    • 1.Re3+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kxd5!
    • 1.Rf3+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kxd5!
    • 1.Rg3+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kxd5!
    • 1.Rh3+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kxd5!
    • 1.Qg4+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxg4!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Rc5#
      • 1...Rb3+
        • 2.R3d4#
      • 1...Rb4+
        • 2.Rc3#
      • 1...Rb5+
        • 2.R5d4#
      • 1...Se4+
        • 2.Qxe4#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...b5+
        • 2.Rd6#
      • 1...Sxd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK::QAB(B)+R(C),DCHECK
    • S(f);OGATE,P_SPINS(f),XR(C)::QAB1(B),XS(f)
    • S(f);N_GUARD::QAR2(B)
    • S(f);N_GUARD::QAR2(B),XS(f)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • B(G)+R(E),DCHECK
      • Vars
        • R(d);CHECK,SBLOCK::QAB(B)+R(C),DCHECK
        • R(d);CHECK,SBLOCK::B(G)+R(E),DCHECK
        • S(f);OGATE,P_SPINS(f),XR(C)::QAB1(B),XS(f)
      • Refutation
        • S(h);CHECK
    • Try
      • K(F);S_FLIGHT
      • Threat
        • B(G)+R(E),DCHECK
      • Vars
        • S(f);OGATE,P_SPINS(f),XR(C)::QAB1(B),XS(f)
      • Refutation
        • R(j);CHECK
    • Try
      • R(C);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(B),XS(f)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • R(C);CHECK
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • R(C);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(B),XS(f)
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • R(C);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(B),XS(f)
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • R(C);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(B),XS(f)
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • R(C);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(B),XS(f)
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR2(B),XS(f)
      • Refutation
        • S(f);XQ(B)
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • B(G)+R(E),DCHECK
    • Vars
      • R(d);CHECK,SBLOCK::QAB(B)+R(C),DCHECK
      • R(d);CHECK,SBLOCK::B(G)+R(E),DCHECK
      • S(f);CHECK,N_GUARD::QAR2(B),XS(f)
      • S(f);CHECK,N_GUARD::QAR(B),XS(f)
      • P(k);CHECK,SBLOCK::B(G)+R(E)
      • S(f);OGATE,P_SPINS(f),XR(C)::QAB1(B),XS(f)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).