MESON Chess Problem Database
Problem Display
PID: 241431 (2N1Q3/1rprP3/Kpk1p3/1RPn4/1P5p/3R2pP/2NPn1B1/8 w - - 0 1)
Hjelle, David
Parallele 50, 1951
#2
12 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra7+
- 2.Sxa7#
- 1...Rb8
- 2.Sa7#
- 1...Sc1
- 2.Sd4#
- 1...Sg1
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...bxc5
- 2.Rxc5#
- 1...e5
- 2.Bxd5#
- 1...Ra7+
- Tries
- 1.Bh1?
- 1...Ra7+
- 2.Sxa7#
- 1...bxc5
- 2.Rxc5#
- 1...Sc1
- 2.Sd4#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...e5
- 2.Bxd5#
- 1...g2!
- 1...Ra7+
- 1.Bf3?
- 1...Ra7+
- 2.Sxa7#
- 1...bxc5
- 2.Rxc5#
- 1...Sc1
- 2.Sd4#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...e5
- 2.Bxd5#
- 1...g2!
- 1...Ra7+
- 1.Be4?
- 1...Ra7+
- 2.Sxa7#
- 1...bxc5
- 2.Rxc5#
- 1...Sc1
- 2.Sd4#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...e5
- 2.Bxd5#
- 1...g2!
- 1...Ra7+
- 1.Ra3?
- 1...Ra7+
- 2.Sxa7#
- 1...bxc5
- 2.Rxc5#
- 1...Sc1
- 2.Sd4#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...e5!
- 1...Ra7+
- 1.Rb3?
- 1...Ra7+
- 2.Sxa7#
- 1...bxc5
- 2.Rxc5#
- 1...Sc1
- 2.Sd4#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...e5!
- 1...Ra7+
- 1.Rc3?
- 1...Ra7+
- 2.Sxa7#
- 1...Sxc3
- 2.Sd4#
- 1...bxc5
- 2.Rcxc5#
- 2.Rbxc5#
- 1...Sc1
- 2.Sd4#
- 2.cxb6#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 2.cxb6#
- 1...Sd4
- 2.Sxd4#
- 2.cxb6#
- 1...Sf4
- 2.Sd4#
- 2.cxb6#
- 1...e5!
- 1...Ra7+
- 1.Re3?
- threat
- 2.Rxe6#
- 1...Ra7+
- 2.Sxa7#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...e5!
- threat
- 1.Rxg3?
- 1...Ra7+
- 2.Sxa7#
- 1...Sxg3
- 2.Sd4#
- 1...bxc5
- 2.Rxc5#
- 1...Sc1
- 2.Sd4#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Sd4#
- 1...e5
- 2.Rg6#
- 1...hxg3!
- 1...Ra7+
- 1.Rxd5?
- threat
- 2.Rd3#
- 2.Rd4#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rd6#
- 2.Rxd7#
- 2.Qxd7#
- 1...Ra7+
- 2.Sxa7#
- 1...Sg1
- 2.Sd4#
- 2.Rd6#
- 2.Qxd7#
- 1...Sc3
- 2.Sd4#
- 2.Rd6#
- 2.Qxd7#
- 1...Sd4
- 2.Sxd4#
- 2.Rxd4#
- 2.Rd6#
- 2.Qxd7#
- 1...Sf4
- 2.Sd4#
- 2.Rd6#
- 2.Qxd7#
- 1...e5
- 2.Rxe5#
- 2.Rd6#
- 2.Qxd7#
- 1...exd5!
- threat
- 1.Bh1?
- Keys
- 1.Rf3!
- 1...Ra7+
- 2.Sxa7#
- 1...Sxb4+
- 2.Sxb4#
- 1...Sxe7
- 2.Sxe7#
- 1...bxc5
- 2.Rxc5#
- 1...Sdc3
- 2.Rxc3#
- 1...Se3
- 2.Rxe3#
- 1...Sdf4
- 2.Rxf4#
- 1...Sf6
- 2.Rxf6#
- 1...Sc1
- 2.Sd4#
- 1...Rb8
- 2.Sa7#
- 1...Sg1
- 2.Sd4#
- 1...Sec3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sef4
- 2.Sd4#
- 1...e5
- 2.Rf6#
- 1...Ra7+
- 1.Rf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(h);CHECK,N_GUARD::S(K),XR(h)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- P(g);N_GUARD::B(C),XS(d)
- Tries
- Try
- B(C);
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- S(a);N_GUARD::S(A)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::B(C),XS(d)
- Refutation
- P(b);N_SPINS(d)
- Try
- B(C);
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- S(a);N_GUARD::S(A)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::B(C),XS(d)
- Refutation
- P(b);
- Try
- B(C);
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- S(a);N_GUARD::S(A)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::B(C),XS(d)
- Refutation
- P(b);
- Try
- R(D);
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- S(a);N_GUARD::S(A)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- P(g);
- Try
- R(D);
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- S(a);N_GUARD::S(A)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- P(g);
- Try
- R(D);
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- S(a);N_GUARD,XR(D)::S(A)
- R(h);N_GUARD::S(K)
- Refutation
- P(g);
- Try
- R(D);
- Threat
- R(D),XP(g)
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- S(a);N_GUARD::S(A),XS(a)
- S(a);N_GUARD::S(A)
- Refutation
- P(g);
- Try
- R(D);XP(b)
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- S(a);N_GUARD,XR(D)::S(A)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- S(a);N_GUARD::S(A)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A),XS(a)
- P(g);OGATEB::R(D)
- Refutation
- P(c);XR(D)
- Try
- R(D);XS(d)
- Threat
- DUALS(9)
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- Refutation
- P(g);P_SPINP(g),XR(D)
- Try
- Actual
- R(D);N_PINS(d)
- Vars
- R(h);CHECK,N_GUARD::S(K),XR(h)
- S(d);CHECK,XP(F)::S(A),XS(d)
- S(d);XP(J)::S(K),XS(d)
- P(e);OGATE,XP(H)::R1(G),XP(e)
- S(d);OGATEB::B(C)+R(D),XS(d)
- S(a);N_GUARD::S(A)
- R(h);N_GUARD::S(K)
- S(a);N_GUARD::S(A),XS(a)
- P(g);OGATEB::R(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).