MESON Chess Problem Database
Problem Display
PID: 206670 (3nbB2/N2r4/B7/2P2P2/r2kP2R/1R1p1pQ1/1P3K2/N1n5 w - - 0 1)
Grunfeld, Max
L'Alfiere di Re, 1925
#2
12 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxa1
- 2.Rb4#
- 1...Ra2
- 2.Rb4#
- 1...Ra3
- 2.Rb4#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Sb5#
- 1...Ra5
- 2.Rb4#
- 1...Rxa6
- 2.Rb4#
- 1...Rd5
- 2.e5#
- 1...Rd6
- 2.Qxd6#
- 1...Rxa7
- 2.Qd6#
- 1...Rb7
- 2.Qd6#
- 1...Rc7
- 2.Qd6#
- 1...Re7
- 2.Qd6#
- 1...Rf7
- 2.Qd6#
- 1...Rg7
- 2.Qd6#
- 2.Qxg7#
- 1...Rh7
- 2.Qd6#
- 1...Bf7
- 2.Qg7#
- 1...Sa2
- 2.Rxd3#
- 1...Se2
- 2.Rxd3#
- 1...Sxb3
- 2.Sxb3#
- 1...Sc6
- 2.Sxc6#
- 1...Se6
- 2.Sc6#
- 1...Sb7
- 2.Sc6#
- 1...Sf7
- 2.Sc6#
- 1...d2
- 2.Sc2#
- 1...Rxa1
- Tries
- 1.Bd6?
- threat
- 2.Qe5#
- 1...Rxa6
- 2.Rb4#
- 1...Rxd6
- 2.Qxd6#
- 1...Sc6
- 2.Sxc6#
- 1...Sf7
- 2.Sc6#
- 1...Re7!
- threat
- 1.Be7?
- threat
- 2.Qg7#
- 1...Rxa6
- 2.Rb4#
- 1...Rxe7
- 2.Qd6#
- 1...Rd6
- 2.Qxd6#
- 1...Rd5
- 2.e5#
- 1...Sc6
- 2.Sxc6#
- 1...Se6
- 2.Sc6#
- 1...Sf7
- 2.Sc6#
- 1...Bg6!
- threat
- 1.Bg7+?
- 1...Rxg7
- 2.Qd6#
- 1...Kxc5!
- 1...Rxg7
- 1.Rc3?
- threat
- 2.Sb5#
- 1...Rxa7
- 2.Qd6#
- 1...Ra5
- 2.Rc4#
- 1...Rd5
- 2.e5#
- 1...Rd6
- 2.Qxd6#
- 1...Rb7
- 2.Qd6#
- 1...Rc7
- 2.Qd6#
- 1...Re7
- 2.Qd6#
- 1...Rf7
- 2.Qd6#
- 1...Rg7
- 2.Bxg7#
- 2.Qd6#
- 2.Qxg7#
- 1...Rh7
- 2.Qd6#
- 1...Rb4!
- threat
- 1.Bd6?
- Keys
- 1.Rb7!
- 1...Rxa1
- 2.Rb4#
- 1...Rxa6
- 2.Rb4#
- 1...Rxb7
- 2.Qd6#
- 1...Sxb7
- 2.Sc6#
- 1...Rd6
- 2.Qxd6#
- 1...Re7
- 2.Qd6#
- 1...Bg6
- 2.Rxd7#
- 1...Ra2
- 2.Rb4#
- 1...Ra3
- 2.Rb4#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Sb5#
- 1...Ra5
- 2.Rb4#
- 1...Rd5
- 2.e5#
- 1...Rc7
- 2.Qd6#
- 1...Rf7
- 2.Qd6#
- 1...Rg7
- 2.Qd6#
- 2.Qxg7#
- 1...Rh7
- 2.Qd6#
- 1...Bh5
- 2.Rxd7#
- 1...Bf7
- 2.Qg7#
- 1...Sa2
- 2.Sb3#
- 1...Se2
- 2.Sb3#
- 1...Sb3
- 2.Sxb3#
- 1...Sc6
- 2.Sxc6#
- 1...Se6
- 2.Sc6#
- 1...Sf7
- 2.Sc6#
- 1...d2
- 2.Sc2#
- 1...Rxa1
- 1.Rb7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(d);N_GUARD,XS(A)::R(D)
- R(d);N_GUARD,P_PINP(B)::R(D)
- R(d);N_GUARD::R(D)
- R(d);N_GUARD::R(D),XR(d)
- R(d);SBLOCK::S(K)
- R(d);N_GUARD,XB(J)::R(D)
- R(f);SBLOCK::R(G)+P(F)
- R(f);N_GUARD::QAR2(E),XR(f)
- R(f);N_GUARD,XS(K)::QAR2(E)
- R(f);N_GUARD::QAR2(E)
- B(h);S_CUTR(f)::QAB(E)
- S(a);N_GUARD::R1(D),XP(b)
- S(a);XR(D)::S(A),XS(a)
- S(g);N_GUARD::S(K),XS(g)
- S(g);N_GUARD::S(K)
- P(b);N_GUARD::S(A)
- Tries
- Try
- B(L);
- Threat
- QAB1(E)
- Vars
- R(d);N_GUARD,XB(J)::R(D)
- R(f);OGATE,XB(L)::QAR2(E),XR(f)
- S(g);N_GUARD::S(K),XS(g)
- S(g);N_GUARD::S(K)
- Refutation
- R(f);
- Try
- B(L);
- Threat
- QAB(E)
- Vars
- R(d);N_GUARD,XB(J)::R(D)
- R(f);N_GUARD,XB(L)::QAR2(E)
- R(f);N_GUARD::QAR2(E),XR(f)
- R(f);SBLOCK::R(G)+P(F)
- S(g);N_GUARD::S(K),XS(g)
- S(g);N_GUARD::S(K)
- Refutation
- B(h);
- Try
- B(L);CHECK
- Vars
- R(f);XB(L)::QAR2(E)
- Refutation
- K(e);S_FLIGHT,XP(H)
- Try
- R(D);
- Threat
- S(K)
- Vars
- R(f);N_GUARD,XS(K)::QAR2(E)
- R(d);N_GUARD::R1(D)
- R(f);SBLOCK::R(G)+P(F)
- R(f);N_GUARD::QAR2(E),XR(f)
- R(f);N_GUARD::QAR2(E)
- Refutation
- R(d);
- Try
- Actual
- R(D);
- Vars
- R(d);N_GUARD,XS(A)::R(D)
- R(d);N_GUARD,XB(J)::R(D)
- R(f);N_GUARD,XR(D)::QAR2(E)
- S(g);N_GUARD,XR(D)::S(K)
- R(f);N_GUARD::QAR2(E),XR(f)
- R(f);N_GUARD::QAR2(E)
- B(h);N_GUARD::R(D),XR(f)
- R(d);N_GUARD,P_PINP(B)::R(D)
- R(d);N_GUARD::R(D)
- R(d);N_GUARD::R(D),XR(d)
- R(d);SBLOCK::S(K)
- R(f);SBLOCK::R(G)+P(F)
- B(h);S_CUTR(f)::QAB(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(g);N_GUARD::S(K),XS(g)
- S(g);N_GUARD::S(K)
- P(b);N_GUARD::S(A)
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).