MESON Chess Problem Database
Problem Display
PID: 139925 (4K3/3pQ3/2N2P1P/RP3kpP/3RqpN1/3n1P2/2B2n2/1b4b1 w - - 0 1)
Faulkner, William J
Good Companions (December), 1923
#2
12 + 9
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Qxf3
- 2.Qxd7#
- 1...Qd5
- 2.Rxd5#
- 1...Qxc6
- 2.Qe5#
- 1...Qxd4
- 2.Sxd4#
- 1...Qe5
- 2.Qxe5#
- 1...Sd1
- 2.Qxe4#
- 1...Sh1
- 2.Qxe4#
- 1...Sh3
- 2.Qxe4#
- 1...Sxg4
- 2.fxe4#
- 1...Sc1
- 2.Rd5#
- 2.Qe5#
- 1...Se1
- 2.Rd5#
- 2.Qe5#
- 1...Sb2
- 2.Rd5#
- 2.Qe5#
- 1...Sb4
- 2.Qe5#
- 1...Sc5
- 2.Rd5#
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Qxf3
- Tries
- 1.Bxd3?
- threat
- 2.Rd5#
- 2.Qe5#
- 1...Qxd3
- 2.Qe5#
- 2.Qxd7#
- 1...Sxd3
- 2.Qxe4#
- 1...Sxg4
- 2.fxe4#
- 1...dxc6
- 2.Qe5#
- 2.bxc6#
- 1...Ba2
- 2.Qe5#
- 1...d5
- 2.Rxd5#
- 2.Qe5#
- 1...d6
- 2.Rd5#
- 1...Bxd3!
- threat
- 1.Rxe4?
- threat
- 2.Sd4#
- 2.Re5#
- 2.Qxd7#
- 2.Qh7#
- 1...Bxc2
- 2.Sd4#
- 2.Qxd7#
- 2.Qh7#
- 1...Sxe4
- 2.Qxe4#
- 2.Qxd7#
- 1...dxc6
- 2.Re5#
- 2.Qe6#
- 2.Qd7#
- 2.Qh7#
- 1...Ba2
- 2.Sd4#
- 2.Re5#
- 2.Qh7#
- 1...Sd1
- 2.Re5#
- 2.Qxd7#
- 2.Qh7#
- 1...Sh1
- 2.Re5#
- 2.Qxd7#
- 2.Qh7#
- 1...Sh3
- 2.Re5#
- 2.Qxd7#
- 2.Qh7#
- 1...Sc5
- 2.Sd4#
- 2.Re5#
- 2.Qe5#
- 2.Qh7#
- 1...Se5
- 2.Sd4#
- 2.Rxe5#
- 2.Qxe5#
- 1...d5
- 2.Sd4#
- 2.Re5#
- 2.Qe6#
- 2.Qd7#
- 2.Qh7#
- 1...d6
- 2.Sd4#
- 2.Qe6#
- 2.Qd7#
- 2.Qh7#
- 1...Sxg4!
- threat
- 1.Rd5+?
- 1...Qe5
- 2.Sd4#
- 2.Rxe5#
- 2.Qxe5#
- 1...Se5
- 2.Sd4#
- 2.Rxe5#
- 2.Qxe5#
- 2.Qxd7#
- 1...Qxd5!
- 1...Qe5
- 1.fxe4+?
- 1...Sxe4
- 2.Qxd7#
- 1...Kxg4!
- 1...Sxe4
- 1.b6+?
- 1...Qd5
- 2.Rdxd5#
- 2.Raxd5#
- 2.Qxd7#
- 1...Qe5
- 2.Rxe5#
- 2.Qxe5#
- 1...Sc5
- 2.Rd5#
- 2.Qe5#
- 1...Se5
- 2.Rxe5#
- 2.Qxe5#
- 2.Qxd7#
- 1...d5!
- 1...Qd5
- 1.h7?
- threat
- 2.Sh6#
- 1...Sxg4
- 2.fxe4#
- 1...Qxe7+!
- threat
- 1.Bxd3?
- Keys
- 1.Kxd7!
- threat
- 2.Qh7#
- 1...Qd5+
- 2.Rxd5#
- 1...Qxc6+
- 2.bxc6#
- 1...Qxd4+
- 2.Sxd4#
- 1...Qe6+
- 2.Qxe6#
- 1...Qxe7+
- 2.Sxe7#
- 1...Sc5+
- 2.Qxc5#
- 1...Se5+
- 2.Qxe5#
- 1...Qxf3
- 2.Qe6#
- 1...Sxg4
- 2.fxe4#
- threat
- 1.Kxd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(e);N_PINQ(K),P_SPINS(d),XP(B)::QAB(K),XP(i)
- Q(e);N_GUARD,N_PINQ(K),P_SPINS(d)::R(C),XQ(e)
- Q(e);N_GUARD,N_PINQ(K),P_SPINS(d),XS(H)::QAR1(K)
- Q(e);N_PINQ(K),P_SPINS(d),XR(C)::S(H),XQ(e)
- Q(e);N_GUARD,P_SPINS(d)::QAR1(K),XQ(e)
- S(c);N_GUARD::QAB1(K),XQ(e)
- S(c);N_GUARD,SBLOCK,XS(D)::P(B),XQ(e)
- S(d);N_GUARD,P_SPINQ(e)::QAR1(K)
- S(d);N_GUARD,N_PINQ(K),P_SPINQ(e)::QAR1(K),XS(d)
- Tries
- Try
- B(A);P_PINQ(e),XS(d)
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD,N_SPINQ(e),XB(A)::QAB1(K),XQ(e)
- S(c);N_GUARD,SBLOCK,XS(D)::P(B),XQ(e)
- B(a);::QAR1(K)
- P(i);::R(C)
- Refutation
- B(a);N_SPINQ(e),XB(A)
- Try
- R(C);N_SPINQ(K),XQ(e)
- Threat
- DUALS(4)
- Refutation
- S(c);XS(D)
- Try
- R(C);CHECK
- Refutation
- Q(e);N_PINQ(K),P_SPINS(d),XR(C)
- Try
- P(B);CHECK,N_SPINQ(K),XQ(e)
- Vars
- S(c);XP(B)::QAB(K),XP(i)
- Refutation
- K(g);S_FLIGHT,XS(D)
- Try
- P(F);CHECK
- Refutation
- P(i);P_SPINP(i)
- Try
- P(J);
- Threat
- S(D)
- Vars
- S(c);N_GUARD,SBLOCK,XS(D)::P(B),XQ(e)
- Refutation
- Q(e);CHECK,P_SPINS(d),XQ(K)
- Try
- Actual
- K(L);N_SPINQ(K),S_FLIGHT,XP(i)
- Threat
- QAB(K)
- Vars
- Q(e);CHECK,N_GUARD,P_SPINS(d)::R(C),XQ(e)
- Q(e);CHECK,OGATE,P_SPINS(d),XS(H)::R(E)+P(F),XQ(e)
- Q(e);CHECK,P_SPINS(d),XR(C)::S(H),XQ(e)
- Q(e);CHECK,N_GUARD,P_SPINS(d)::QAB1(K),XQ(e)
- Q(e);CHECK,P_SPINS(d),XQ(K)::S(H),XQ(e)
- S(d);CHECK,N_GUARD,P_SPINQ(e)::QAR(K),XS(d)
- S(d);CHECK,N_GUARD,P_SPINQ(e)::QAR1(K),XS(d)
- Q(e);N_GUARD,P_SPINS(d),XP(B)::QAB1(K)
- S(c);N_GUARD,SBLOCK,XS(D)::P(B),XQ(e)
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).