MESON Chess Problem Database
Problem Display
PID: 110743 (1rQ5/5P1K/3p2PP/5RP1/1P1k4/NR1B4/1Ppn2N1/2rn4 w - - 0 1)
Kovacs, Ferenc
1st Prize, Ostdeutsche Morgenpost, 1923
#2
13 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sxc2#
- 1...Rb1
- 2.Sxc2#
- 1...Rxb4
- 2.Qh8#
- 1...Rb5
- 2.Sxb5#
- 1...Rb6
- 2.Qh8#
- 1...Rb7
- 2.Qh8#
- 1...Ra8
- 2.Sb5#
- 1...Rxc8
- 2.Sb5#
- 1...Sxb2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...Sb1
- 2.Qc4#
- 1...Sf1
- 2.Qc4#
- 1...Sxb3
- 2.Qc4#
- 1...Sf3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se4
- 2.Qc4#
- 1...d5
- 2.Qc5#
- 1...Ra1
- Tries
- 1.Qe6?
- threat
- 2.Rd5#
- 2.Qd5#
- 2.Qxd6#
- 2.Qf6#
- 1...Sxb3
- 2.Rd5#
- 2.Qc4#
- 2.Qd5#
- 2.Qe4#
- 2.Qxd6#
- 1...Sc3
- 2.Qe3#
- 1...Rb5
- 2.Sxb5#
- 1...Rb6
- 2.Rd5#
- 2.Qd5#
- 2.Qf6#
- 1...Rd8
- 2.Sb5#
- 2.Rd5#
- 2.Qd5#
- 2.Qf6#
- 1...Re8
- 2.Sb5#
- 2.Rd5#
- 2.Qd5#
- 2.Qxd6#
- 1...Se3
- 2.Qxe3#
- 2.Qf6#
- 1...Sf3
- 2.Rf4#
- 2.Rd5#
- 2.Qc4#
- 2.Qd5#
- 2.Qe4#
- 2.Qxd6#
- 1...Sc4
- 2.Rf4#
- 2.Rd5#
- 2.Qxc4#
- 2.Qd5#
- 2.Qe4#
- 1...Se4
- 2.Rd5#
- 2.Qc4#
- 2.Qd5#
- 2.Qxe4#
- 1...d5
- 2.Rxd5#
- 2.Qxd5#
- 2.Qe5#
- 2.Qf6#
- 1...Rh8+!
- threat
- 1.Qc6?
- threat
- 2.Rd5#
- 2.Qd5#
- 2.Qxd6#
- 1...Sc3
- 2.Qxc3#
- 1...Rb5
- 2.Sxb5#
- 1...Rb6
- 2.Rd5#
- 2.Qd5#
- 2.Qxb6#
- 1...Rd8
- 2.Sb5#
- 2.Rd5#
- 2.Qd5#
- 2.Qb6#
- 1...Se3
- 2.Qc3#
- 1...Sc4
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qxc4#
- 1...Se4
- 2.Rd5#
- 2.Qxe4#
- 2.Qd5#
- 2.Qc4#
- 1...d5
- 2.Rxd5#
- 2.Qxd5#
- 2.Qc5#
- 2.Qf6#
- 1...Rh8+!
- threat
- 1.Qc7?
- threat
- 2.Qxd6#
- 1...Sc3
- 2.Qxc3#
- 1...Rb5
- 2.Sxb5#
- 1...Rb6
- 2.Qxb6#
- 1...Rd8
- 2.Sb5#
- 2.Qb6#
- 2.Qa7#
- 1...Se3
- 2.Qc3#
- 1...Sc4
- 2.Qxc4#
- 1...Se4
- 2.Qc4#
- 1...d5
- 2.Qe5#
- 2.Qc5#
- 1...Rh8+!
- threat
- 1.Qxb8?
- threat
- 2.Sb5#
- 2.Qxd6#
- 2.Qa7#
- 2.Qb6#
- 2.Qh8#
- 1...Sxb3
- 2.Qxd6#
- 1...Se3
- 2.Sb5#
- 2.Qa7#
- 2.Qb6#
- 2.Qh8#
- 1...Sf3
- 2.Sb5#
- 2.Qxd6#
- 2.Qa7#
- 2.Qb6#
- 1...Sc4
- 2.Sb5#
- 1...Se4
- 2.Sb5#
- 1...d5
- 2.Sb5#
- 2.Qe5#
- 2.Qa7#
- 2.Qb6#
- 2.Qh8#
- 1...Sc3!
- threat
- 1.f8Q?
- threat
- 2.Qxd6#
- 2.Qg7#
- 2.Qf6#
- 2.Qh8#
- 1...Rxc8
- 2.Sb5#
- 2.Qxd6#
- 2.Qg7#
- 2.Qf6#
- 1...Sxb3
- 2.Qxd6#
- 2.Qc4#
- 1...Sc3
- 2.Qxc3#
- 1...Rb6
- 2.Qg7#
- 2.Qf6#
- 2.Qh8#
- 1...Rb5
- 2.Sxb5#
- 1...Se3
- 2.Qg7#
- 2.Qc3#
- 2.Qf6#
- 2.Qh8#
- 1...Sf3
- 2.Qxd6#
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se4
- 2.Qc4#
- 1...d5
- 2.Qfc5#
- 2.Qg7#
- 2.Qcc5#
- 2.Qf6#
- 2.Qh8#
- 1...Rb7+!
- threat
- 1.f8S?
- threat
- 2.Se6#
- 1...Sxb3
- 2.Qc4#
- 1...Sc3
- 2.Qxc3#
- 1...Rb7+!
- threat
- 1.f8B?
- threat
- 2.Bg7#
- 1...Sxb3
- 2.Qc4#
- 1...Sc3
- 2.Qxc3#
- 1...Rb5
- 2.Sxb5#
- 1...Sf3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se4
- 2.Qc4#
- 1...Rb7+!
- threat
- 1.Qe6?
- Keys
- 1.Qe8!
- 1...Rxb4
- 2.Qh8#
- 1...Rxe8
- 2.Sb5#
- 1...Sxb2
- 2.Qe3#
- 1...Sxb3
- 2.Qe4#
- 1...Sc3
- 2.Qe3#
- 1...Ra1
- 2.Sxc2#
- 1...Rb1
- 2.Sxc2#
- 1...Rb5
- 2.Sxb5#
- 1...Rb6
- 2.Qh8#
- 1...Rb7
- 2.Qh8#
- 1...Ra8
- 2.Sb5#
- 1...Rc8
- 2.Sb5#
- 1...Rd8
- 2.Sb5#
- 1...Sf2
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sf3
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...d5
- 2.Qe5#
- 1...Rxb4
- 1.Qe8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 11
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::S(C),XP(c)
- R(g);N_GUARD,XP(F)::QAB(M)
- R(g);N_GUARD::S(C),XR(g)
- R(g);N_GUARD::QAB(M)
- R(g);N_GUARD,P_PINP(K)::QAB(M)
- R(g);N_GUARD::S(C)
- R(g);N_GUARD,XQ(M)::S(C)
- S(b);N_GUARD,XP(A)::QAB1(M)
- S(b);N_GUARD::QAB1(M)
- S(b);N_GUARD::QAB1(M),XS(b)
- S(d);N_GUARD::QAR1(M)
- S(d);N_GUARD,XR(D)::QAR1(M)
- S(d);N_GUARD::QAR1(M),XS(d)
- P(f);N_GUARD::QAB1(M)
- Tries
- Try
- Q(M);
- Threat
- DUALS(4)
- Vars
- S(b);N_GUARD::QAB1(M)
- R(g);N_GUARD::S(C),XR(g)
- Refutation
- R(g);CHECK
- Try
- Q(M);
- Threat
- DUALS(3)
- Vars
- S(b);N_GUARD::QAB1(M),XS(b)
- R(g);N_GUARD::S(C),XR(g)
- S(b);N_GUARD::QAB1(M)
- Refutation
- R(g);CHECK
- Try
- Q(M);
- Threat
- QAR2(M),XP(f)
- Vars
- S(b);N_GUARD::QAB1(M),XS(b)
- R(g);N_GUARD::S(C),XR(g)
- R(g);N_GUARD::QAB(M),XR(g)
- S(b);N_GUARD::QAB1(M)
- S(d);N_GUARD::QAR1(M),XS(d)
- S(d);N_GUARD::QAR1(M)
- Refutation
- R(g);CHECK
- Try
- Q(M);XR(g)
- Threat
- DUALS(5)
- Vars
- S(d);XR(D)::QAR2(M),XP(f)
- S(d);::S(C)
- Refutation
- S(b);
- Try
- P(K);
- Threat
- DUALS(4)
- Vars
- S(b);N_GUARD::QAB1(M),XS(b)
- R(g);N_GUARD::S(C),XR(g)
- S(d);N_GUARD::QAR1(M),XS(d)
- S(d);N_GUARD::QAR1(M)
- Refutation
- R(g);CHECK
- Try
- P(K);
- Threat
- S(K)
- Vars
- S(d);N_GUARD,XR(D)::QAR1(M)
- S(b);N_GUARD::QAB1(M),XS(b)
- Refutation
- R(g);CHECK
- Try
- P(K);
- Threat
- B(K)
- Vars
- S(d);N_GUARD,XR(D)::QAR1(M)
- S(b);N_GUARD::QAB1(M),XS(b)
- R(g);N_GUARD::S(C),XR(g)
- S(d);N_GUARD::QAR1(M)
- S(d);N_GUARD::QAR1(M),XS(d)
- Refutation
- R(g);CHECK
- Try
- Actual
- Q(M);
- Vars
- R(g);N_GUARD,XP(F)::QAB(M)
- R(g);N_GUARD,XQ(M)::S(C)
- S(b);N_GUARD,XP(A)::QAB1(M)
- S(d);N_GUARD,XR(D)::QAR1(M)
- S(b);N_GUARD::QAB1(M)
- R(a);N_GUARD::S(C),XP(c)
- R(g);N_GUARD::S(C),XR(g)
- R(g);N_GUARD::QAB(M)
- R(g);N_GUARD,P_PINP(K)::QAB(M)
- R(g);N_GUARD::S(C)
- S(b);N_GUARD::QAB1(M),XS(b)
- S(d);N_GUARD::QAR1(M)
- S(d);N_GUARD::QAR1(M),XS(d)
- P(f);N_GUARD::QAB1(M)
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).