MESON Chess Problem Database
Problem Display
PID: 2998 (2n5/1NK3B1/2B1p1P1/2pp4/2r1k3/2pR1Rpr/2n4p/7N w - - 0 1)
Opdenoordt, Joseph J
Source?, 1916
#2
8 + 11
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rb4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Se3
- 2.Rdxe3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5
- 2.Bxd5#
- 1...Rh4
- Tries
- 1.Kd7?
- 1...Se3
- 2.Rdxe3#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rb4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5
- 2.Bxd5#
- 1...Sb6+!
- 1...Se3
- 1.Kb8?
- 1...Se3
- 2.Rdxe3#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5
- 2.Bxd5#
- 1...Rb4!
- 1...Se3
- 1.Kxc8?
- threat
- 2.Sd6#
- 1...Se3
- 2.Rdxe3#
- 1...Rh8+!
- threat
- 1.Kd8?
- 1...Se3
- 2.Rdxe3#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rb4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5
- 2.Bxd5#
- 1...Rh8+!
- 1...Se3
- 1.Ba4?
- 1...Rxa4
- 2.Sxc5#
- 1...Se3
- 2.Rdxe3#
- 1...d4
- 2.Bc6#
- 1...Rb4
- 2.Sxc5#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5!
- 1...Rxa4
- 1.Bb5?
- 1...Se3
- 2.Rdxe3#
- 1...d4
- 2.Bc6#
- 1...Rb4
- 2.Sxc5#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5!
- 1...Se3
- 1.Be8?
- 1...Se3
- 2.Rdxe3#
- 1...d4
- 2.Bc6#
- 1...Rb4
- 2.Sxc5#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5!
- 1...Se3
- 1.Bf6?
- 1...Se3
- 2.Rdxe3#
- 1...Rb4
- 2.Sxc5#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5
- 2.Bxd5#
- 1...Rh7+!
- 1...Se3
- 1.Kd7?
- Keys
- 1.Bd7!
- 1...Se3
- 2.Rdxe3#
- 1...d4
- 2.Bc6#
- 1...Rb4
- 2.Sxc5#
- 1...Rh4
- 2.Sxg3#
- 1...Rh5
- 2.Sxg3#
- 1...Rh6
- 2.Sxg3#
- 1...Rh7
- 2.Sxg3#
- 1...Rh8
- 2.Sxg3#
- 1...Ra4
- 2.Sxc5#
- 1...Rd4
- 2.Sxc5#
- 1...Sa1
- 2.Rde3#
- 1...Se1
- 2.Rde3#
- 1...Sa3
- 2.Rde3#
- 1...Sb4
- 2.Rde3#
- 1...Sd4
- 2.Rde3#
- 1...Sb6
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...g2
- 2.Sf2#
- 1...e5
- 2.Bf5#
- 1...Se3
- 1.Bd7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(e);N_GUARD::S(A),XP(d)
- R(e);N_GUARD,P_PINB(H)::S(A),XP(d)
- R(f);N_GUARD::S(F),XP(h)
- S(a);N_GUARD::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- P(j);N_GUARD::B(D),XP(i)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- R(e);N_GUARD::S(A),XP(d)
- R(e);N_GUARD,P_PINB(H)::S(A),XP(d)
- R(f);N_GUARD::S(F),XP(h)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F),XS(k)
- S(k);N_GUARD::S(F)
- P(d);N_GUARD::S(A)
- P(j);N_GUARD::B(D),XP(i)
- Refutation
- S(k);CHECK
- Try
- K(G);S_FLIGHT
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- R(e);N_GUARD::S(A),XP(d)
- R(f);N_GUARD::S(F),XP(h)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- P(j);N_GUARD::B(D),XP(i)
- Refutation
- R(f);P_PINS(F)
- Try
- K(G);P-FLIGHT,XS(k)
- Threat
- S(F)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- Refutation
- R(e);CHECK
- Try
- K(G);S_FLIGHT
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- R(e);N_GUARD::S(A),XP(d)
- R(f);N_GUARD::S(F),XP(h)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- P(j);N_GUARD::B(D),XP(i)
- Refutation
- R(e);CHECK
- Try
- B(D);N_PINP(i)
- Vars
- R(f);N_GUARD,XB(D)::S(F),XP(h)
- S(a);N_GUARD::R1(B),XS(a)
- P(i);OGATEB::B(D)
- R(f);N_GUARD::S(F),XP(h)
- R(e);N_GUARD::S(A),XP(d)
- R(e);N_GUARD,P_PINB(H)::S(A),XP(d)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- Refutation
- P(j);
- Try
- B(D);N_PINP(i)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- P(i);OGATEB::B(D)
- R(f);N_GUARD::S(F),XP(h)
- R(e);N_GUARD::S(A),XP(d)
- R(e);N_GUARD,P_PINB(H)::S(A),XP(d)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- Refutation
- P(j);
- Try
- B(D);N_PINP(i)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- P(i);OGATEB::B(D)
- R(f);N_GUARD::S(F),XP(h)
- R(e);N_GUARD::S(A),XP(d)
- R(e);N_GUARD,P_PINB(H)::S(A),XP(d)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- Refutation
- P(j);
- Try
- B(H);
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- R(f);N_GUARD::S(F),XP(h)
- R(e);N_GUARD::S(A),XP(d)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- P(j);N_GUARD::B(D),XP(i)
- Refutation
- R(e);CHECK
- Try
- Actual
- B(D);N_PINP(i)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- P(i);OGATEB::B(D)
- R(f);N_GUARD::S(F),XP(h)
- R(e);N_GUARD::S(A),XP(d)
- S(a);N_GUARD::R1(B)
- S(k);N_GUARD::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);N_GUARD::S(A)
- P(j);OGATE::B(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).