MESON Chess Problem Database
Problem Display
PID: 102514 (5K2/BpR5/2q1p3/Qp2pn2/1rk1B3/Rp6/3PN3/3r1N2 w - - 0 1)
Watson, Charles Gilbert Marriott
8th Prize, L'Echiquier, 1930
#2
9 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc5+
- 2.Rxc5#
- 1...Qxc7
- 2.Qxc7#
- 1...Ra1
- 2.d3#
- 1...Rb1
- 2.d3#
- 1...Rc1
- 2.d3#
- 1...Re1
- 2.d3#
- 1...Rxf1
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...Ra4
- 2.Qc3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sd6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Se7
- 2.Se3#
- 1...Sg7
- 2.Se3#
- 1...b2
- 2.Rc3#
- 1...b6
- 2.Rxc6#
- 1...Qc5+
- Tries
- 1.Bb6?
- 1...Qc5+
- 2.Rxc5#
- 1...Rxf1
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...Ra1
- 2.d3#
- 1...Rb1
- 2.d3#
- 1...Rc1
- 2.d3#
- 1...Re1
- 2.d3#
- 1...Ra4
- 2.Qc3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sd6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Se7
- 2.Se3#
- 1...Sg7
- 2.Se3#
- 1...b2
- 2.Rc3#
- 1...Qxc7!
- 1...Qc5+
- 1.Ra1?
- 1...Qc5+
- 2.Rxc5#
- 1...Qxc7
- 2.Qxc7#
- 1...Rxa1
- 2.d3#
- 1...Rxf1
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...b6
- 2.Rxc6#
- 1...Rb1
- 2.d3#
- 1...Rc1
- 2.Rxc1#
- 2.d3#
- 1...Re1
- 2.d3#
- 1...Ra4
- 2.Qc3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sd6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Se7
- 2.Se3#
- 1...Sg7
- 2.Se3#
- 1...b2!
- 1...Qc5+
- 1.Ra4?
- threat
- 2.Rxb4#
- 2.Qxb4#
- 1...Qc5+
- 2.Rxc5#
- 1...Rxa4
- 2.Qc3#
- 1...b6
- 2.Rxc6#
- 2.Qxb4#
- 1...bxa4!
- threat
- 1.Rc8?
- 1...Qc5+
- 2.Rxc5#
- 1...Rxf1
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...b6
- 2.Rxc6#
- 1...Ra1
- 2.d3#
- 1...Qc7
- 2.Rxc7#
- 2.Qxc7#
- 1...Rb1
- 2.d3#
- 1...Rc1
- 2.d3#
- 1...Re1
- 2.d3#
- 1...Ra4
- 2.Qc3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sd6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Se7
- 2.Se3#
- 1...Sg7
- 2.Se3#
- 1...b2
- 2.Rc3#
- 1...Qxc8+!
- 1...Qc5+
- 1.Qb6?
- 1...Qc5+
- 2.Rxc5#
- 2.Qxc5#
- 1...Qxc7
- 2.Qxc7#
- 2.Qxe6#
- 1...Rxf1
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...Ra1
- 2.d3#
- 1...Rb1
- 2.d3#
- 1...Rc1
- 2.d3#
- 1...Re1
- 2.d3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sd6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Se7
- 2.Se3#
- 1...Sg7
- 2.Se3#
- 1...b2
- 2.Rc3#
- 1...Ra4!
- 1...Qc5+
- 1.Bb6?
- Keys
- 1.Qa6!
- 1...Qc5+
- 2.Rxc5#
- 1...Qxc7
- 2.Qxe6#
- 1...Rxf1
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...bxa6
- 2.Rxc6#
- 1...Ra4
- 2.Rxa4#
- 1...b6
- 2.Rxc6#
- 1...Ra1
- 2.d3#
- 1...Rb1
- 2.d3#
- 1...Rc1
- 2.d3#
- 1...Re1
- 2.d3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sd6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Se7
- 2.Se3#
- 1...Sg7
- 2.Se3#
- 1...b2
- 2.Rc3#
- 1...Qc5+
- 1.Qa6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(h);CHECK,OGATE::R1(H),XQ(h)
- Q(h);N_SPINQ(h),OGATE,XR(H)::QAR(F),XQ(h)
- R(a);N_GUARD::P(B)
- R(a);N_GUARD,XS(A)::P(B)
- R(a);XP(B)::S(A),XR(a)
- R(c);OGATE::QAR1(F)
- S(g);N_GUARD::S(A),XS(g)
- S(g);N_GUARD::S(A)
- P(b);OGATE::R1(D)
- P(j);N_GUARD::R(H),XQ(h)
- Tries
- Try
- B(G);
- Vars
- Q(h);CHECK,OGATE::R1(H),XQ(h)
- R(a);N_GUARD,XS(A)::P(B)
- R(a);XP(B)::S(A),XR(a)
- R(a);N_GUARD::P(B)
- R(c);OGATE::QAR1(F)
- S(g);N_GUARD::S(A),XS(g)
- S(g);N_GUARD::S(A)
- P(b);OGATE::R1(D)
- Refutation
- Q(h);N_SPINQ(h),XR(H)
- Try
- R(D);
- Vars
- Q(h);CHECK,OGATE::R1(H),XQ(h)
- Q(h);N_SPINQ(h),OGATE,XR(H)::QAR(F),XQ(h)
- R(a);N_GUARD,XR(D)::P(B)
- R(a);N_GUARD,XS(A)::P(B)
- R(a);XP(B)::S(A),XR(a)
- P(j);N_GUARD::R(H),XQ(h)
- R(a);N_GUARD::P(B)
- R(c);OGATE::QAR1(F)
- S(g);N_GUARD::S(A),XS(g)
- S(g);N_GUARD::S(A)
- Refutation
- P(b);
- Try
- R(D);P_PINR(c)
- Threat
- DUALS(2)
- Vars
- Q(h);CHECK,OGATE::R1(H),XQ(h)
- R(c);N_SPINR(c),OGATE,XR(D)::QAR1(F)
- Refutation
- P(e);N_SPINR(c),XR(D)
- Try
- R(H);
- Vars
- Q(h);CHECK,OGATE::R1(H),XQ(h)
- R(a);N_GUARD,XS(A)::P(B)
- R(a);XP(B)::S(A),XR(a)
- P(j);N_GUARD::R(H),XQ(h)
- R(a);N_GUARD::P(B)
- R(c);OGATE::QAR1(F)
- S(g);N_GUARD::S(A),XS(g)
- S(g);N_GUARD::S(A)
- P(b);OGATE::R1(D)
- Refutation
- Q(h);CHECK,N_SPINQ(h),XR(H)
- Try
- Q(F);
- Vars
- R(a);N_GUARD,XS(A)::P(B)
- R(a);XP(B)::S(A),XR(a)
- R(a);N_GUARD::P(B)
- S(g);N_GUARD::S(A),XS(g)
- S(g);N_GUARD::S(A)
- P(b);OGATE::R1(D)
- Refutation
- R(c);
- Try
- Actual
- Q(F);P_PINP(e)
- Vars
- Q(h);CHECK,OGATE::R1(H),XQ(h)
- Q(h);N_SPINQ(h),OGATE,XR(H)::QAB(F),XP(i)
- R(a);N_GUARD,XS(A)::P(B)
- R(a);XP(B)::S(A),XR(a)
- P(j);N_GUARD,N_SPINP(e),XQ(F)::R(H),XQ(h)
- R(c);OGATEB::R(D),XR(c)
- P(j);N_GUARD::R(H),XQ(h)
- R(a);N_GUARD::P(B)
- S(g);N_GUARD::S(A),XS(g)
- S(g);N_GUARD::S(A)
- P(b);OGATE::R1(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).