MESON Chess Problem Database
Problem Display
PID: 43567 (4K3/4B3/2p1k1p1/2RpppR1/2r1p1r1/1Np1P1pN/2P1Q1P1/8 w - - 0 1)
Sommer, Bruno Oswald
Schach-Express, 1948
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rxc5
- 2.Sxc5#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...Rxg5
- 2.Sxg5#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...Ra4
- Tries
- 1.Sa1?
- 1...Rxg5
- 2.Sxg5#
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...Rxc5!
- 1...Rxg5
- 1.Sc1?
- 1...Rxg5
- 2.Sxg5#
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...Rxc5!
- 1...Rxg5
- 1.Sd4+?
- 1...Rxd4
- 2.Rxc6#
- 1...exd4!
- 1...Rxd4
- 1.Sa5?
- 1...Rxg5
- 2.Sxg5#
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...Rxc5!
- 1...Rxg5
- 1.Sg1?
- 1...Rxc5
- 2.Sxc5#
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...Rxg5!
- 1...Rxc5
- 1.Sf4+?
- 1...Rxf4
- 2.Rxg6#
- 1...exf4!
- 1...Rxf4
- 1.Rxc4?
- threat
- 2.Sc5#
- 2.Rxc6#
- 1...dxc4
- 2.Qxc4#
- 1...c5
- 2.Sxc5#
- 1...d4!
- threat
- 1.Rb5?
- 1...Rxg5
- 2.Sxg5#
- 1...Ra4
- 2.Sc5#
- 1...Rb4
- 2.Sc5#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...c5
- 2.Rb6#
- 1...cxb5!
- 1...Rxg5
- 1.Rxg4?
- threat
- 2.Sg5#
- 2.Rxg6#
- 1...fxg4
- 2.Qxg4#
- 1...g5
- 2.Sxg5#
- 1...f4!
- threat
- 1.Rh5?
- 1...Rxc5
- 2.Sxc5#
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rf4
- 2.Sg5#
- 1...Rh4
- 2.Sg5#
- 1...Rg5
- 2.Sxg5#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...g5
- 2.Rh6#
- 1...gxh5!
- 1...Rxc5
- 1.Qd1?
- 1...Rxc5
- 2.Sxc5#
- 1...Rxg5
- 2.Sxg5#
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...f4
- 2.Qxg4#
- 1...d4!
- 1...Rxc5
- 1.Qf1?
- 1...Rxc5
- 2.Sxc5#
- 1...Rxg5
- 2.Sxg5#
- 1...Ra4
- 2.Rxc6#
- 1...Rb4
- 2.Rxc6#
- 1...Rd4
- 2.Rxc6#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...d4
- 2.Qxc4#
- 1...f4!
- 1...Rxc5
- 1.Sa1?
- Keys
- 1.Ra5!
- 1...Rxg5
- 2.Sxg5#
- 1...Ra4
- 2.Sc5#
- 1...Rb4
- 2.Sc5#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rf4
- 2.Rxg6#
- 1...Rh4
- 2.Rxg6#
- 1...d4
- 2.Qxc4#
- 1...f4
- 2.Qxg4#
- 1...c5
- 2.Ra6#
- 1...Rxg5
- 1.Ra5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::R(G),XP(i)
- R(c);XR(G)::S(D),XR(c)
- R(e);N_GUARD::R(H),XP(k)
- R(e);XR(H)::S(F),XR(e)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- Tries
- Try
- S(D);
- Vars
- R(e);XR(H)::S(F),XR(e)
- R(c);N_GUARD::R(G),XP(i)
- R(e);N_GUARD::R(H),XP(k)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- Refutation
- R(c);XR(G)
- Try
- S(D);
- Vars
- R(e);XR(H)::S(F),XR(e)
- R(c);N_GUARD::R(G),XP(i)
- R(e);N_GUARD::R(H),XP(k)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- Refutation
- R(c);XR(G)
- Try
- S(D);CHECK
- Vars
- R(c);XS(D)::R(G),XP(i)
- Refutation
- P(g);XS(D)
- Try
- S(D);
- Vars
- R(e);XR(H)::S(F),XR(e)
- R(c);N_GUARD::R(G),XP(i)
- R(e);N_GUARD::R(H),XP(k)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- Refutation
- R(c);XR(G)
- Try
- S(F);
- Vars
- R(c);XR(G)::S(D),XR(c)
- R(c);N_GUARD::R(G),XP(i)
- R(e);N_GUARD::R(H),XP(k)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- Refutation
- R(e);XR(H)
- Try
- S(F);CHECK
- Vars
- R(e);XS(F)::R(H),XP(k)
- Refutation
- P(g);XS(F)
- Try
- R(G);XR(c)
- Threat
- DUALS(2)
- Vars
- P(f);OGATE,XR(G)::QAB(B),XP(f)
- P(i);::S(D),XP(i)
- Refutation
- P(f);
- Try
- R(G);
- Vars
- R(e);XR(H)::S(F),XR(e)
- R(c);N_GUARD::S(D)
- R(c);N_GUARD::S(D),XR(c)
- R(e);N_GUARD::R(H),XP(k)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- P(i);OGATEB::R(G)
- Refutation
- P(i);XR(G)
- Try
- R(H);XR(e)
- Threat
- DUALS(2)
- Vars
- P(h);OGATE,XR(H)::QAB(B),XP(h)
- P(k);::S(F),XP(k)
- Refutation
- P(h);
- Try
- R(H);
- Vars
- R(c);XR(G)::S(D),XR(c)
- R(c);N_GUARD::R(G),XP(i)
- R(e);N_GUARD::S(F)
- R(e);N_GUARD::S(F),XR(e)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- P(k);OGATEB::R(H)
- Refutation
- P(k);XR(H)
- Try
- Q(B);
- Vars
- R(c);XR(G)::S(D),XR(c)
- R(e);XR(H)::S(F),XR(e)
- R(c);N_GUARD::R(G),XP(i)
- R(e);N_GUARD::R(H),XP(k)
- P(h);OGATEB::QAB(B),XR(e)
- Refutation
- P(f);
- Try
- Q(B);
- Vars
- R(c);XR(G)::S(D),XR(c)
- R(e);XR(H)::S(F),XR(e)
- R(c);N_GUARD::R(G),XP(i)
- R(e);N_GUARD::R(H),XP(k)
- P(f);OGATEB::QAB(B),XR(c)
- Refutation
- P(h);
- Try
- Actual
- R(G);
- Vars
- R(e);XR(H)::S(F),XR(e)
- R(c);N_GUARD::S(D)
- R(c);N_GUARD::S(D),XR(c)
- R(e);N_GUARD::R(H),XP(k)
- P(f);OGATEB::QAB(B),XR(c)
- P(h);OGATEB::QAB(B),XR(e)
- P(i);OGATEB::R(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).