MESON Chess Problem Database
Problem Display
PID: 251629 (8/2p1K3/4N1B1/3Nk3/2P3np/pr2rbRq/1R2n2B/Q7 w - - 0 1)
Malcom, James
The Problemist Supplement, 2021
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rd3
- 2.Rxe2#
- 1...Bh1
- 2.Rxe3#
- 1...Bg2
- 2.Rxe3#
- 1...Bxd5
- 2.Rxe3#
- 1...Sf2
- 2.Rg5#
- 1...Sf6
- 2.Rg5#
- 1...Sh6
- 2.Rg5#
- 1...Rd3
- Tries
- 1.Sb6?
- threat
- 2.Sd7#
- 1...Rxb6
- 2.Rb5#
- 1...Rbd3
- 2.Rb5#
- 1...Red3
- 2.Rxe2#
- 1...Bc6
- 2.Rxe3#
- 1...Sf6
- 2.Rg5#
- 1...cxb6!
- threat
- 1.Rxe2+?
- 1...Rc3
- 2.Qxc3#
- 1...Rb2!
- 1...Rc3
- 1.Rxg4+?
- 1...Qxh2
- 2.Rg5#
- 1...Qg3
- 2.Rg5#
- 1...Sf4
- 2.Bxf4#
- 1...Sg3!
- 1...Qxh2
- 1.Sb6?
- Keys
- 1.Sf6!
- threat
- 2.Sd7#
- 1...Sxf6
- 2.Rg5#
- 1...Rbd3
- 2.Rb5#
- 1...Red3
- 2.Rxe2#
- 1...Bc6
- 2.Rxe3#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- R(d);::QAB(A)+R(B),DCHECK,XS(a)
- B(e);OGATE::B(C)+R(D),DCHECK,XR(d)
- B(e);OGATE,XS(F)::B(C)+R(D),DCHECK,XR(d)
- S(g);OGATE::B(C)+R(D),DCHECK
- Tries
- Try
- S(F);
- Threat
- S(F)
- Vars
- R(c);OGATE,XS(F)::QAB(A)+R(B),DCHECK
- R(c);OGATE::QAB(A)+R(B),DCHECK
- R(d);::QAB(A)+R(B),DCHECK,XS(a)
- B(e);OGATE::B(C)+R(D),DCHECK,XR(d)
- S(g);OGATE::B(C)+R(D),DCHECK
- Refutation
- P(j);XS(F)
- Try
- R(B);CHECK,P_PINR(d),XS(a)
- Vars
- R(c);N_GUARD,N_SPINR(d),P_SPINR(c)::QAB(A),XR(c)
- Refutation
- R(c);N_SPINR(d),P_SPINR(c)
- Try
- R(D);CHECK,XS(g)
- Vars
- Q(f);XB(C)::R(D)
- Q(f);P_SPINQ(f)::R(D)
- S(a);N_GUARD,P_SPINS(a)::B(C),XS(a)
- Refutation
- S(a);P_SPINS(a)
- Try
- Actual
- S(F);
- Threat
- S(F)
- Vars
- S(g);OGATE,XS(F)::B(C)+R(D),DCHECK
- R(c);OGATE::QAB(A)+R(B),DCHECK
- R(d);::QAB(A)+R(B),DCHECK,XS(a)
- B(e);OGATE::B(C)+R(D),DCHECK,XR(d)
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).