MESON Chess Problem Database
Problem Display
PID: 3077 (8/3p3N/1n1P2R1/1Qb1Pk1P/p3ppN1/PrP4p/B5nB/5R1K w - - 0 1)
Cockburn, LH
Source?, 1918
#2
13 + 10
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Rg5#
- 1...Rb2
- 2.Rg5#
- 1...Rxa3
- 2.Rg5#
- 1...Rxc3
- 2.Rg5#
- 1...Rb4
- 2.Rg5#
- 1...Rxb5
- 2.Rg5#
- 1...Bg1
- 2.Sh6#
- 1...Bf2
- 2.Sh6#
- 1...Bxa3
- 2.Sh6#
- 1...Be3
- 2.Sh6#
- 1...Bb4
- 2.Sh6#
- 1...Bd4
- 2.Sh6#
- 1...Bxd6
- 2.Sh6#
- 1...Se1
- 2.Rxf4#
- 1...Se3
- 2.Rxf4#
- 1...Sh4
- 2.Rxf4#
- 1...Sc4
- 2.Qxd7#
- 1...Sd5
- 2.Qxd7#
- 1...Sa8
- 2.Qxd7#
- 1...Sc8
- 2.Qxd7#
- 1...e3
- 2.Qd3#
- 1...f3
- 2.Sh6#
- 1...Rb1
- Tries
- 1.Bxb3?
- threat
- 2.Rg5#
- 1...e3
- 2.Bc2#
- 2.Qd3#
- 1...Sc4
- 2.Qxd7#
- 1...Sd5
- 2.Qxd7#
- 1...axb3!
- threat
- 1.Bg3?
- 1...Rxa3
- 2.Rg5#
- 1...Rxc3
- 2.Rg5#
- 1...Rxb5
- 2.Rg5#
- 1...Bxa3
- 2.Sh6#
- 1...Bxd6
- 2.Sh6#
- 1...e3
- 2.Qd3#
- 1...Rb1
- 2.Rg5#
- 1...Rb2
- 2.Rg5#
- 1...Rb4
- 2.Rg5#
- 1...Bg1
- 2.Sh6#
- 1...Bf2
- 2.Sh6#
- 1...Be3
- 2.Sh6#
- 1...Bb4
- 2.Sh6#
- 1...Bd4
- 2.Sh6#
- 1...Se1
- 2.Rxf4#
- 1...Se3
- 2.Rxf4#
- 1...Sh4
- 2.Rxf4#
- 1...Sc4
- 2.Qxd7#
- 1...Sd5
- 2.Qxd7#
- 1...Sa8
- 2.Qxd7#
- 1...Sc8
- 2.Qxd7#
- 1...f3
- 2.Sh6#
- 1...h2!
- 1...Rxa3
- 1.Rf2?
- 1...Rxa3
- 2.Rg5#
- 1...Rxc3
- 2.Rg5#
- 1...Rxb5
- 2.Rg5#
- 1...Bxf2
- 2.Sh6#
- 1...Bxa3
- 2.Sh6#
- 1...Bxd6
- 2.Sh6#
- 1...e3
- 2.Qd3#
- 1...Se1
- 2.Rxf4#
- 1...Rb2
- 2.Rg5#
- 1...Rb4
- 2.Rg5#
- 1...Be3
- 2.Sh6#
- 1...Bb4
- 2.Sh6#
- 1...Bd4
- 2.Sh6#
- 1...Se3
- 2.Rxf4#
- 1...Sh4
- 2.Rxf4#
- 1...Sc4
- 2.Qxd7#
- 1...Sd5
- 2.Qxd7#
- 1...Sa8
- 2.Qxd7#
- 1...Sc8
- 2.Qxd7#
- 1...f3
- 2.Sh6#
- 1...Rb1+!
- 1...Rxa3
- 1.Rf3?
- 1...Rxa3
- 2.Rg5#
- 1...Rxc3
- 2.Rg5#
- 1...Rxb5
- 2.Rg5#
- 1...Bxa3
- 2.Sh6#
- 1...Bxd6
- 2.Sh6#
- 1...exf3
- 2.Qd3#
- 1...e3
- 2.Qd3#
- 1...Se1
- 2.Rxf4#
- 1...Rb2
- 2.Rg5#
- 1...Rb4
- 2.Rg5#
- 1...Bg1
- 2.Sh6#
- 1...Bf2
- 2.Sh6#
- 1...Be3
- 2.Sh6#
- 1...Bb4
- 2.Sh6#
- 1...Bd4
- 2.Sh6#
- 1...Se3
- 2.Rxf4#
- 1...Sh4
- 2.Rxf4#
- 1...Sc4
- 2.Qxd7#
- 1...Sd5
- 2.Qxd7#
- 1...Sa8
- 2.Qxd7#
- 1...Sc8
- 2.Qxd7#
- 1...Rb1+!
- 1...Rxa3
- 1.Qe2?
- threat
- 2.Rf6#
- 1...e3
- 2.Qd3#
- 2.Qc2#
- 1...f3
- 2.Sh6#
- 1...Sd5!
- threat
- 1.Bxb3?
- Keys
- 1.Rg1!
- 1...Rxa3
- 2.Rg5#
- 1...Rxc3
- 2.Rg5#
- 1...Rxb5
- 2.Rg5#
- 1...Bxg1
- 2.Sh6#
- 1...Bxa3
- 2.Sh6#
- 1...Bxd6
- 2.Sh6#
- 1...e3
- 2.Qd3#
- 1...Se1
- 2.Rf6#
- 1...Rb1
- 2.Rg5#
- 1...Rb2
- 2.Rg5#
- 1...Rb4
- 2.Rg5#
- 1...Bf2
- 2.Sh6#
- 1...Be3
- 2.Sh6#
- 1...Bb4
- 2.Sh6#
- 1...Bd4
- 2.Sh6#
- 1...Se3
- 2.Rf6#
- 1...Sh4
- 2.Rf6#
- 1...Sc4
- 2.Qxd7#
- 1...Sd5
- 2.Qxd7#
- 1...Sa8
- 2.Qxd7#
- 1...Sc8
- 2.Qxd7#
- 1...f3
- 2.Sh6#
- 1...Rxa3
- 1.Rg1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(b);P_PINR(A)::R1(L)
- R(b);::R1(L)
- R(b);XP(E)::R1(L)
- R(b);XP(F)::R1(L)
- R(b);XQ(H)::R1(L)
- B(g);::S(G)
- B(g);N_SPINP(f)::S(G)
- B(g);XP(E)::S(G)
- B(g);XP(K)::S(G)
- S(a);N_GUARD::R1(A),XP(f)
- S(i);N_GUARD::QAB(H),XP(j)
- P(e);OGATEB::QAB(H)
- P(f);::S(G)
- Tries
- Try
- B(C);XR(b)
- Threat
- R1(L)
- Vars
- S(i);N_GUARD::QAB(H),XP(j)
- Refutation
- P(d);XB(C)
- Try
- B(D);
- Vars
- R(b);XP(E)::R1(L)
- R(b);XP(F)::R1(L)
- R(b);XQ(H)::R1(L)
- B(g);XP(E)::S(G)
- B(g);XP(K)::S(G)
- P(e);OGATEB::QAB(H)
- R(b);P_PINR(A)::R1(L)
- R(b);::R1(L)
- B(g);::S(G)
- B(g);N_SPINP(f)::S(G)
- S(a);N_GUARD::R1(A),XP(f)
- S(i);N_GUARD::QAB(H),XP(j)
- P(f);::S(G)
- Refutation
- P(c);
- Try
- R(A);
- Vars
- R(b);XP(E)::R1(L)
- R(b);XP(F)::R1(L)
- R(b);XQ(H)::R1(L)
- B(g);N_SPINP(f),XR(A)::S(G)
- B(g);XP(E)::S(G)
- B(g);XP(K)::S(G)
- P(e);OGATEB::QAB(H)
- S(a);N_GUARD::R1(A),XP(f)
- R(b);::R1(L)
- B(g);::S(G)
- S(i);N_GUARD::QAB(H),XP(j)
- P(f);::S(G)
- Refutation
- R(b);CHECK
- Try
- R(A);
- Vars
- R(b);XP(E)::R1(L)
- R(b);XP(F)::R1(L)
- R(b);XQ(H)::R1(L)
- B(g);XP(E)::S(G)
- B(g);XP(K)::S(G)
- P(e);N_SPINP(f),OGATEB,XR(A)::QAB(H)
- P(e);OGATEB::QAB(H)
- S(a);N_GUARD::R1(A),XP(f)
- R(b);::R1(L)
- B(g);::S(G)
- S(i);N_GUARD::QAB(H),XP(j)
- Refutation
- R(b);CHECK
- Try
- Q(H);
- Threat
- R1(L)
- Vars
- P(f);::S(G)
- Refutation
- S(i);
- Try
- Actual
- R(A);N_PINP(f)
- Vars
- R(b);XP(E)::R1(L)
- R(b);XP(F)::R1(L)
- R(b);XQ(H)::R1(L)
- B(g);XR(A)::S(G)
- B(g);XP(E)::S(G)
- B(g);XP(K)::S(G)
- P(e);OGATEB::QAB(H)
- S(a);::R1(L)
- R(b);P_PINR(A)::R1(L)
- R(b);::R1(L)
- B(g);::S(G)
- S(i);N_GUARD::QAB(H),XP(j)
- P(f);::S(G)
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).