MESON Chess Problem Database
Problem Display
PID: 4625 (1R1n4/3pkN1Q/3RN1K1/8/Br6/B7/8/8 w - - 0 1)
Dennis, Charles Edwin
1st Prize, Mirror of American Sports, 1884
#2
8 + 4
SOLUTION
- SOUND
- Sets
- 1...Sxe6
- 2.Rxd7#
- 1...Sxe6
- Tries
- 1.Sfg5+?
- 1...Ke8
- 2.Bxd7#
- 2.Rxd8#
- 2.Qxd7#
- 2.Qf7#
- 1...Sf7
- 2.Rxd7#
- 1...Kxd6!
- 1...Ke8
- 1.Sh6+?
- 1...Ke8
- 2.Bxd7#
- 2.Rxd8#
- 2.Qxd7#
- 2.Qf7#
- 1...Sf7
- 2.Sf5#
- 1...Kxd6!
- 1...Ke8
- 1.Sfxd8+?
- 1...Ke8
- 2.Sb7#
- 2.Bxd7#
- 2.Qxd7#
- 2.Qf7#
- 1...Kxd6!
- 1...Ke8
- 1.Bxb4?
- 1...Sxe6
- 2.Rxd7#
- 1...Sxf7
- 2.Qxf7#
- 1...dxe6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rdb6#
- 2.Rdxd8#
- 1...Sc6
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Sb7
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Ke8!
- 1...Sxe6
- 1.Rxd7+?
- 1...Ke8
- 2.Sd6#
- 2.Rbxd8#
- 2.Qg8#
- 2.Qh8#
- 1...Kxe6!
- 1...Ke8
- 1.Rxd8?
- 1...Rg4+
- 2.Sfg5#
- 1...Rxa4
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 1...dxe6
- 2.Se5#
- 2.Sg5#
- 2.Sh6#
- 2.Sh8#
- 2.R6d7#
- 2.Re8#
- 1...Rb1
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Rb2
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Rb3
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Rc4
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 1...Rd4
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 1...Re4
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 1...Rh4
- 2.Sh6#
- 2.Qxh4#
- 1...Rb5
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 1...Rb6
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Rb7
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Rb8
- 2.Se5#
- 2.Sfg5#
- 2.Sh6#
- 2.Sh8#
- 2.Qh4#
- 1...Rf4!
- 1...Rg4+
- 1.Qg8?
- threat
- 2.Qxd8#
- 2.Qf8#
- 1...Rxb8
- 2.Qf8#
- 1...Sxe6
- 2.Rxd7#
- 2.Re8#
- 2.Qe8#
- 1...Sxf7
- 2.Qf8#
- 1...dxe6
- 2.Rd7#
- 2.Qxd8#
- 2.Qe8#
- 1...Sc6
- 2.Re8#
- 2.Qe8#
- 2.Qf8#
- 1...Sb7
- 2.Re8#
- 2.Qe8#
- 2.Qf8#
- 1...Rg4+!
- threat
- 1.Qh4+?
- 1...Ke8
- 2.Bxd7#
- 2.Rxd8#
- 2.Qxd8#
- 1...Rxh4!
- 1...Ke8
- 1.Qh8?
- threat
- 2.Qxd8#
- 2.Qf8#
- 1...Rxb8
- 2.Qf8#
- 1...Sxe6
- 2.Rxd7#
- 2.Re8#
- 2.Qf6#
- 2.Qe8#
- 1...Sxf7
- 2.Qf8#
- 1...dxe6
- 2.Rd7#
- 2.Qxd8#
- 2.Qe8#
- 1...Sc6
- 2.Re8#
- 2.Qf6#
- 2.Qe8#
- 2.Qf8#
- 1...Sb7
- 2.Re8#
- 2.Qf6#
- 2.Qe8#
- 2.Qf8#
- 1...Rg4+!
- threat
- 1.Sfg5+?
- Keys
- 1.Rd5!
- 1...Kxe6
- 2.Re5#
- 1...Ke8
- 2.Sd6#
- 1...Sxe6
- 2.Rxd7#
- 1...Sxf7
- 2.Qxf7#
- 1...dxe6
- 2.Bxb4#
- 1...Sc6
- 2.Sfg5#
- 1...Sb7
- 2.Sfg5#
- 1...d6
- 2.Sfxd8#
- 1...Kxe6
- 1.Rd5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- S(d);SBLOCK,XS(D)::R1(C),XP(b)
- Tries
- Try
- S(F);CHECK
- Vars
- S(d);P_SPINS(d)::R1(C),XP(b)
- Refutation
- K(c);P_SPINR(a),S_FLIGHT,XR(C)
- Try
- S(F);CHECK
- Vars
- S(d);P_SPINS(d)::S(F)
- Refutation
- K(c);P_SPINR(a),S_FLIGHT,XR(C)
- Try
- S(F);CHECK,XS(d)
- Refutation
- K(c);P_SPINR(a),S_FLIGHT,XR(C)
- Try
- B(A);XR(a)
- Vars
- S(d);SBLOCK,XS(D)::B(A)+R(C),DCHECK,XP(b)
- S(d);OGATE,P_SPINS(d),XS(F)::QAR1(G),XS(d)
- Refutation
- K(c);P-FLIGHT,P_SPINP(b),P_SPINS(d)
- Try
- R(C);CHECK,P_PINR(a),XP(b)
- Refutation
- K(c);N_SPINR(a),P-FLIGHT,XS(D)
- Try
- R(H);XS(d)
- Vars
- R(a);CHECK::QAR(G)+S(F)
- Refutation
- R(a);
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(a);XR(H)::QAB1(G)
- S(d);XS(F)::QAB1(G)
- Refutation
- R(a);CHECK
- Try
- Q(G);CHECK
- Refutation
- R(a);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(a);XR(H)::QAB1(G)
- S(d);XS(F)::QAB1(G)
- Refutation
- R(a);CHECK
- Try
- Actual
- R(C);P_PINR(a)
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,XS(D)::R1(C)
- K(c);N_SPINR(a),P-FLIGHT,P_SPINP(b),P_SPINS(d)::S(F)
- S(d);SBLOCK,XS(D)::R1(C),XP(b)
- S(d);OGATE,P_SPINS(d),XS(F)::QAR1(G),XS(d)
- P(b);N_GUARD,SBLOCK,XS(D)::B(A),XR(a)
- S(d);N_GUARD::QAR(G)+S(F)
- P(b);N_SPINR(a)::QAR(G)+S(F),XS(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).