MESON Chess Problem Database
Problem Display
PID: 4656 (8/2RK1p2/N2n1B2/3k4/2rb4/1r3P1n/B5N1/4Q3 w - - 0 1)
Robbins, Alexander Henry
Prize, Southern Trade Gazette, 1885
#2
8 + 7
| 3360 | Simple Two-move Themes | 1924 |
| 23 | Die Schwalbe | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Sb4#
- 1...Rbc3
- 2.Sb4#
- 1...Rd3
- 2.Sb4#
- 1...Re3
- 2.Sb4#
- 1...Rxf3
- 2.Sb4#
- 1...Rbb4
- 2.Sxb4#
- 1...Rc1
- 2.Sb4#
- 1...Rc2
- 2.Sb4#
- 1...Rcc3
- 2.Sb4#
- 1...Rcb4
- 2.Sxb4#
- 1...Bg1
- 2.Qe5#
- 1...Bf2
- 2.Qe5#
- 1...Bc3
- 2.Se3#
- 1...Bc5
- 2.Qe5#
- 1...Be5
- 2.Qxe5#
- 1...Bb6
- 2.Qe5#
- 1...Ba7
- 2.Qe5#
- 1...Sg1
- 2.Sf4#
- 1...Sf2
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg5
- 2.Sf4#
- 1...Se4
- 2.Qxe4#
- 2.fxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Ra3
- Tries
- 1.Se3+?
- 1...Rxe3
- 2.Sb4#
- 1...Bxe3!
- 1...Rxe3
- 1.Bxb3?
- threat
- 2.Sb4#
- 1...Be5
- 2.Qxe5#
- 1...Bc3
- 2.Se3#
- 2.Rc5#
- 1...Bc5
- 2.Rxc5#
- 2.Qe5#
- 1...Bxf6!
- threat
- 1.Rc5+?
- 1...Bxc5
- 2.Sc7#
- 2.Qe5#
- 1...Rxc5!
- 1...Bxc5
- 1.Se3+?
- Keys
- 1.Qc3!
- 1...Rxc7+
- 2.Sxc7#
- 1...Rbxc3
- 2.Sb4#
- 1...Rcxc3
- 2.Sb4#
- 1...Bxc3
- 2.Se3#
- 1...Bxf6
- 2.Se3#
- 1...Rb1
- 2.Qxd4#
- 1...Rb2
- 2.Qxd4#
- 1...Ra3
- 2.Sb4#
- 2.Qxd4#
- 1...Rbb4
- 2.Sxb4#
- 2.Qxd4#
- 1...Rb5
- 2.Qxd4#
- 1...Rb6
- 2.Qxd4#
- 1...Rb7
- 2.Qxd4#
- 1...Rb8
- 2.Qxd4#
- 1...Ra4
- 2.Qc6#
- 1...Rcb4
- 2.Sxb4#
- 2.Qc6#
- 1...Rc5
- 2.Sb4#
- 2.Qxd4#
- 1...Rc6
- 2.Sb4#
- 2.Qxd4#
- 2.Qxc6#
- 1...Bg1
- 2.Qe5#
- 1...Bf2
- 2.Qe5#
- 1...Be3
- 2.Sxe3#
- 2.Qe5#
- 1...Bc5
- 2.Qe5#
- 1...Be5
- 2.Se3#
- 2.Qxe5#
- 1...Bb6
- 2.Qe5#
- 1...Ba7
- 2.Qe5#
- 1...Sg1
- 2.Sf4#
- 1...Sf2
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg5
- 2.Sf4#
- 1...Se4
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...Sf5
- 2.Qxc4#
- 1...Sb7
- 2.Qxc4#
- 1...Sc8
- 2.Qxc4#
- 1...Se8
- 2.Qxc4#
- 1...Rxc7+
- 1.Qc3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 5
- ADDED MATES = 10
- REMOVED MATES = 9
- Sets
- R(a);N_GUARD,P_SPINR(c)::S(E)
- R(a);N_GUARD,P_SPINR(c),XP(D)::S(E)
- R(a);N_GUARD,P_SPINR(c)::S(E),XR(a)
- R(c);N_GUARD,P_SPINR(a)::S(E)
- R(c);N_GUARD,P_SPINR(a)::S(E),XR(c)
- B(d);N_GUARD::QAR1(A)
- B(d);N_GUARD,S_CUTR(a)::S(C)
- B(d);N_GUARD::QAR1(A),XB(d)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(f);N_GUARD::QAB1(A)
- Tries
- Try
- S(C);CHECK
- Vars
- R(a);P_SPINR(c),XS(C)::S(E)
- Refutation
- B(d);XS(C)
- Try
- B(B);P_PINR(c),XR(a)
- Threat
- S(E)
- Vars
- B(d);N_GUARD::QAR1(A),XB(d)
- Refutation
- B(d);XB(F)
- Try
- R(G);CHECK
- Refutation
- R(c);P_SPINR(a),XR(G)
- Try
- Actual
- Q(A);
- Vars
- R(c);CHECK,P_SPINR(a),XR(G)::S(E),XR(c)
- R(a);N_GUARD,P_SPINR(c),XQ(A)::S(E)
- R(c);N_GUARD,P_SPINR(a),XQ(A)::S(E)
- B(d);N_GUARD,XQ(A)::S(C)
- B(d);N_GUARD,XB(F)::S(C)
- R(a);P_SPINR(c)::QAR1(A),XB(d)
- R(a);P_PINR(G),P_SPINR(c)::QAR1(A),XB(d)
- R(c);OGATE,P_SPINR(a)::QAB1(A)
- B(d);OGATE::QAR1(A)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(f);N_GUARD::QAB1(A),XR(c)
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).