MESON Chess Problem Database
Problem Display
PID: 229128 (3r4/Q2b4/1rB5/5P2/nB1k1K2/4N3/1P2P3/n1N5 w - - 0 1)
Franken, Maurits
Shakhmaty v SSSR, 1926
#2
9 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra8
- 2.Qxd7#
- 1...Rb8
- 2.Qxd7#
- 1...Rc8
- 2.Qxd7#
- 1...Re8
- 2.Qxd7#
- 1...Rf8
- 2.Qxd7#
- 1...Rg8
- 2.Qxd7#
- 1...Rh8
- 2.Qxd7#
- 1...Bxf5
- 2.Qg7#
- 1...Bxc6
- 2.Qg7#
- 1...Be6
- 2.Qg7#
- 1...Bc8
- 2.Qg7#
- 1...Be8
- 2.Qg7#
- 1...Sc2
- 2.Sb3#
- 1...Sb3
- 2.Sxb3#
- 1...Sxb2
- 2.Qxb6#
- 1...Sc3
- 2.Qxb6#
- 2.bxc3#
- 1...Sc5
- 2.Bc3#
- 1...Ra8
- Tries
- 1.Bc3+?
- 1...Sxc3
- 2.Qxb6#
- 1...Kc5!
- 1...Sxc3
- 1.Qxb6+?
- 1...Sc5
- 2.Bc3#
- 2.Bxc5#
- 2.Qxc5#
- 1...Sxb6!
- 1...Sc5
- 1.Qxa4?
- threat
- 2.Qd1#
- 1...Rxb4
- 2.Qxb4#
- 1...Sc2
- 2.Sb3#
- 1...Sb3
- 2.Sxb3#
- 1...Bxf5!
- threat
- 1.Qa5?
- threat
- 2.Qd5#
- 2.Qe5#
- 1...Bxf5
- 2.Qe5#
- 1...Bxc6
- 2.Qe5#
- 1...Re8
- 2.Qd5#
- 1...Be6
- 2.Qe5#
- 1...Bc8
- 2.Qe5#
- 1...Be8
- 2.Qe5#
- 1...Sc3
- 2.Bxc3#
- 2.Bc5#
- 2.Qxb6#
- 2.Qc5#
- 2.Qe5#
- 2.bxc3#
- 1...Sc5
- 2.Bc3#
- 2.Bxc5#
- 2.Qxc5#
- 1...Rb5!
- threat
- 1.Qc7?
- threat
- 2.Qe5#
- 2.Qd6#
- 1...Rxc6
- 2.Qe5#
- 1...Bxf5
- 2.Qe5#
- 2.Qg7#
- 1...Bxc6
- 2.Qe5#
- 2.Qg7#
- 1...Re8
- 2.Qd6#
- 2.Qxd7#
- 1...Be6
- 2.Qe5#
- 2.Qg7#
- 1...Bc8
- 2.Qe5#
- 2.Qg7#
- 1...Be8
- 2.Qe5#
- 2.Qg7#
- 1...Sc3
- 2.Qe5#
- 2.Qxb6#
- 2.bxc3#
- 1...Rb5!
- threat
- 1.Bc3+?
- Keys
- 1.b3!
- 1...Bxf5
- 2.Sxf5#
- 2.Qg7#
- 1...Bxc6
- 2.Qg7#
- 1...Sxb3
- 2.Sxb3#
- 1...Ra8
- 2.Qxd7#
- 1...Rb8
- 2.Qxd7#
- 1...Rc8
- 2.Qxd7#
- 1...Re8
- 2.Qxd7#
- 1...Rf8
- 2.Qxd7#
- 1...Rg8
- 2.Qxd7#
- 1...Rh8
- 2.Qxd7#
- 1...Be6
- 2.Qg7#
- 1...Bc8
- 2.Qg7#
- 1...Be8
- 2.Qg7#
- 1...Sc2
- 2.Sxc2#
- 1...Sb2
- 2.Qxb6#
- 1...Sc3
- 2.Qxb6#
- 1...Sc5
- 2.Qxa1#
- 1...Bxf5
- 1.b3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(f);N_GUARD::QAR(I),XB(e)
- R(f);N_GUARD,P_PINP(G)::QAR(I),XB(e)
- B(e);OGATE,XP(G)::QAB(I)
- B(e);OGATE,XB(H)::QAB(I)
- B(e);OGATE::QAB(I)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD,XP(B)::QAB(I),XR(d)
- S(b);N_GUARD,N_SPINR(d),SBLOCK::B(E)
- Tries
- Try
- B(E);CHECK
- Vars
- S(b);XB(E)::QAB(I),XR(d)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(I);CHECK,XR(d)
- Refutation
- S(b);XQ(I)
- Try
- Q(I);N_PINR(d),XS(b)
- Threat
- QAR(I)
- Vars
- R(d);OGATE,P_SPINR(d),XB(E)::QAR2(I),XR(d)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- B(e);XP(G)
- Try
- Q(I);N_PINR(d)
- Threat
- DUALS(2)
- Vars
- B(e);XP(G)::QAB1(I)
- B(e);XB(H)::QAB1(I)
- R(f);::QAR1(I)
- B(e);::QAB1(I)
- Refutation
- R(d);
- Try
- Q(I);N_PINR(d)
- Threat
- DUALS(2)
- Vars
- R(d);XB(H)::QAB1(I)
- Refutation
- R(d);
- Try
- Actual
- P(B);
- Vars
- B(e);OGATE,XB(H)::QAB(I)
- S(a);XP(B)::S(A),XS(a)
- R(f);N_GUARD::QAR(I),XB(e)
- R(f);N_GUARD,P_PINP(G)::QAR(I),XB(e)
- B(e);OGATE::QAB(I)
- S(a);N_GUARD::S(D),XS(a)
- S(b);N_GUARD::QAB(I),XR(d)
- S(b);N_SPINR(d),OGATE::QAB(I),XS(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).