MESON Chess Problem Database
Problem Display
PID: 140453 (B2n1R2/2K1P1rR/4k3/p1p1np1b/N5pB/2qpQ2N/5r2/8 w - - 0 1)
Durairaj, T
4th Prize, BCF 131. Ty., 1972-1973
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Sxc5#
- 1...Qe1
- 2.Sxc5#
- 1...Qb2
- 2.Sxc5#
- 1...Qd2
- 2.Sxc5#
- 1...Qb3
- 2.Sxc5#
- 1...Ra2
- 2.Sf4#
- 1...Rb2
- 2.Sf4#
- 1...Rc2
- 2.Sf4#
- 1...Rd2
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Rg2
- 2.Sf4#
- 1...Rh2
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Rg5
- 2.Sxg5#
- 2.exd8S#
- 1...Rg6
- 2.exd8S#
- 2.e8Q#
- 2.e8R#
- 1...Rxe7+
- 2.Rxe7#
- 1...Rg8
- 2.Rf6#
- 2.exd8S#
- 1...Bf7
- 2.exd8S#
- 1...Sf7
- 2.e8Q#
- 2.e8R#
- 1...c4
- 2.Sc5#
- 1...Qa1
- Tries
- 1.Sg5+?
- 1...Rxg5
- 2.exd8S#
- 1...Kxe7!
- 1...Rxg5
- 1.Rh6+?
- 1...Rg6
- 2.exd8S#
- 2.e8Q#
- 2.e8R#
- 1...Bg6!
- 1...Rg6
- 1.Qxf2?
- threat
- 2.Sf4#
- 2.Qxf5#
- 1...Rxe7+
- 2.Rxe7#
- 1...gxh3
- 2.Qxf5#
- 1...Sc4
- 2.Qxf5#
- 1...Sec6
- 2.Qxf5#
- 1...Sg6
- 2.Qxf5#
- 1...Sd7
- 2.Qxf5#
- 1...Sef7
- 2.e8Q#
- 2.e8R#
- 1...Sdc6
- 2.Sf4#
- 1...Sb7
- 2.Sf4#
- 1...Qd4
- 2.Qxf5#
- 1...Qd2
- 2.Sxc5#
- 2.Qxf5#
- 1...Qb4
- 2.Qxf5#
- 1...Qc1
- 2.Qxf5#
- 1...Qc4
- 2.Qxf5#
- 1...Rg5
- 2.Sf4#
- 2.Sxg5#
- 2.exd8S#
- 1...Rf7
- 2.Sf4#
- 1...Bg6
- 2.Sf4#
- 1...Bf7
- 2.Sf4#
- 2.exd8S#
- 1...Sdf7
- 2.Sf4#
- 2.e8Q#
- 2.e8R#
- 1...f4
- 2.Sxf4#
- 1...Sf3!
- threat
- 1.Sg5+?
- Keys
- 1.Qxc5!
- threat
- 2.Bd5#
- 2.Rf6#
- 1...Qxc5+
- 2.Sxc5#
- 1...Rxe7+
- 2.Rxe7#
- 1...Qd4
- 2.Rf6#
- 1...Qb3
- 2.Rf6#
- 2.Qd6#
- 1...Qc4
- 2.Rf6#
- 1...Rg5
- 2.Sxg5#
- 2.Bd5#
- 2.exd8S#
- 1...Rg6
- 2.Bd5#
- 2.exd8S#
- 2.e8Q#
- 2.e8R#
- 1...Rf7
- 2.Bd5#
- 1...Bf7
- 2.Bd5#
- 2.exd8S#
- 1...Sf3
- 2.Sf4#
- 1...Sc4
- 2.Qd5#
- 1...Sec6
- 2.Qd6#
- 1...Sg6
- 2.Sg5#
- 1...Sd7
- 2.exd8S#
- 1...Sef7
- 2.e8Q#
- 2.e8R#
- 1...Sdc6
- 2.Rf6#
- 2.Qd6#
- 1...Sb7
- 2.Rf6#
- 1...Sdf7
- 2.Bd5#
- 2.e8Q#
- 2.e8R#
- threat
- 1.Qxc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 15
- Sets
- Q(b);N_GUARD::S(C),XP(f)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD::S(B),XR(a)
- R(k);CHECK,OGATE,XP(F)::R1(G),XR(k)
- B(i);N_PINP(F)::PXS(l)=S
- S(l);N_PINP(F)::P=Q
- P(f);S_CUTQ(b)::S(C)
- Tries
- Try
- S(B);CHECK
- Vars
- R(k);N_PINP(F),XS(B)::PXS(l)=S
- Refutation
- K(j);P-FLIGHT,P_SPINR(k),XP(F)
- Try
- R(G);CHECK
- Refutation
- B(i);P_SPINB(i)
- Try
- Q(A);N_PINS(g),XR(a)
- Threat
- DUALS(2)
- Vars
- R(k);CHECK,OGATE,XP(F)::R1(G),XR(k)
- P(d);XS(B)::QAB1(A),XP(h)
- S(g);::QAB1(A),XP(h)
- S(g);N_PINP(F)::QAB1(A),XP(h)
- S(g);N_PINP(F)::P=Q
- S(l);::S(B)
- Q(b);::QAB1(A),XP(h)
- R(k);::S(B)
- B(i);::S(B)
- P(h);::S(B),XP(h)
- Refutation
- S(g);
- Try
- Actual
- Q(A);N_PINS(g),P_SPINQ(A),XP(f)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,XQ(A)::S(C),XQ(b)
- R(k);CHECK,OGATE,XP(F)::R1(G),XR(k)
- Q(b);N_PINQ(A)::R1(I)
- Q(b);::R1(I)
- R(k);::B(H)
- S(g);S_CUTR(a)::S(B)
- S(g);N_PINQ(A)::QAB1(A)
- S(g);N_PINQ(A)::QAR1(A)
- S(g);S_CUTR(k)::S(B)
- S(g);N_PINP(F)::PXS(l)=S
- S(g);N_PINP(F)::P=Q
- S(l);::R1(I)
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).