MESON Chess Problem Database
Problem Display
PID: 262511 (5r2/1pR5/3n1BQ1/1PPk1B2/1K2N2p/1PP5/3n4/b3R3 w - - 0 1)
Hermanson, Halvar
2nd Prize, Europe Echecs, 1970
#2
11 + 7
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rxf6
- 2.Sxf6#
- 1...Bxc3+
- 2.Sxc3#
- 1...Sxf5
- 2.Qxf5#
- 1...Rxf6
- Tries
- 1.Bg7?
- threat
- 2.Be6#
- 2.Qxd6#
- 2.Qe6#
- 1...Bxc3+
- 2.Sxc3#
- 1...Rxf5
- 2.Qxd6#
- 1...S2xe4
- 2.Be6#
- 2.Qe6#
- 1...S6xe4
- 2.Be6#
- 2.Qe6#
- 1...Sxb5
- 2.Be6#
- 2.Qe6#
- 1...Rf6
- 2.Sxf6#
- 1...Rd8
- 2.Sf6#
- 2.Be6#
- 2.Qe6#
- 1...Re8
- 2.Sf6#
- 2.Qxd6#
- 1...S2c4
- 2.Be6#
- 2.Qe6#
- 1...S6c4
- 2.Be6#
- 2.Qe6#
- 1...Sf7
- 2.Sf6#
- 2.Be6#
- 2.Qe6#
- 1...Sc8
- 2.Be6#
- 2.Qe6#
- 1...Se8
- 2.Be6#
- 2.Qe6#
- 1...Sxf5!
- threat
- 1.Bh8?
- threat
- 2.Be6#
- 2.Qxd6#
- 2.Qe6#
- 1...Bxc3+
- 2.Sxc3#
- 1...Rxf5
- 2.Qxd6#
- 1...Rxh8
- 2.Sf6#
- 2.Qxd6#
- 2.Qe6#
- 1...S2xe4
- 2.Be6#
- 2.Qe6#
- 1...S6xe4
- 2.Be6#
- 2.Qe6#
- 1...Sxb5
- 2.Be6#
- 2.Qe6#
- 1...Rf6
- 2.Sxf6#
- 1...Rd8
- 2.Sf6#
- 2.Be6#
- 2.Qe6#
- 1...Re8
- 2.Sf6#
- 2.Qxd6#
- 1...S2c4
- 2.Be6#
- 2.Qe6#
- 1...S6c4
- 2.Be6#
- 2.Qe6#
- 1...Sf7
- 2.Sf6#
- 2.Be6#
- 2.Qe6#
- 1...Sc8
- 2.Be6#
- 2.Qe6#
- 1...Se8
- 2.Be6#
- 2.Qe6#
- 1...Sxf5!
- threat
- 1.Rd1?
- threat
- 2.Rxd2#
- 1...Bxc3+
- 2.Sxc3#
- 1...Sxe4
- 2.c4#
- 1...Sxb5
- 2.c4#
- 1...Sxf5
- 2.Qxf5#
- 1...Sc4
- 2.bxc4#
- 1...Rxf6!
- threat
- 1.Re7?
- threat
- 2.Be6#
- 2.Re5#
- 1...Bxc3+
- 2.Sxc3#
- 1...Rxf6
- 2.Sxf6#
- 1...Sxf5
- 2.Re5#
- 2.Qxf5#
- 1...Re8
- 2.Be6#
- 1...Sf3
- 2.Be6#
- 1...S2c4
- 2.Be6#
- 1...S6c4
- 2.Be6#
- 1...Sf7
- 2.Be6#
- 1...Sxb5!
- threat
- 1.Qg2?
- threat
- 2.Qxd2#
- 1...Bxc3+
- 2.Sxc3#
- 1...Rxf6
- 2.Sxf6#
- 1...Sxb3
- 2.Sxd6#
- 1...S2xe4
- 2.Rd1#
- 1...S6xe4
- 2.Rd7#
- 1...Sxb5
- 2.Sxd2#
- 1...Sxf5
- 2.Sxd2#
- 1...Sb1
- 2.Sxd6#
- 1...Sf1
- 2.Sxd6#
- 1...S2c4
- 2.Sxd6#
- 1...S6c4
- 2.Sxd2#
- 1...Sf3!
- threat
- 1.Qg3?
- threat
- 2.Qe5#
- 2.Qxd6#
- 2.Qd3#
- 1...Bxc3+
- 2.Sxc3#
- 1...Rxf6
- 2.Sxf6#
- 1...Sxb3
- 2.Qe5#
- 2.Qxd6#
- 1...S2xe4
- 2.Qe5#
- 2.Qd3#
- 1...S6xe4
- 2.Qe5#
- 2.Qd3#
- 1...Sxb5
- 2.Qe5#
- 1...Sxf5
- 2.Qe5#
- 1...Rd8
- 2.Qe5#
- 2.Qd3#
- 1...Re8
- 2.Qxd6#
- 2.Qd3#
- 1...Sf3
- 2.Qxd6#
- 1...S2c4
- 2.Qd3#
- 1...S6c4
- 2.Qd3#
- 1...Sf7
- 2.Qd3#
- 1...Sc8
- 2.Qe5#
- 2.Qd3#
- 1...Se8
- 2.Qe5#
- 2.Qd3#
- 1...hxg3!
- threat
- 1.Qg4?
- threat
- 2.Be6#
- 1...Bxc3+
- 2.Sxc3#
- 1...Rxf6
- 2.Sxf6#
- 1...Sxf5
- 2.Qxf5#
- 1...Re8!
- threat
- 1.Bg7?
- Keys
- 1.Rd7!
- threat
- 2.Rxd6#
- 1...Bxc3+
- 2.Sxc3#
- 1...Rxf6
- 2.Sxf6#
- 1...Sxe4
- 2.c4#
- 1...Rd8
- 2.Qf7#
- 1...Sc4
- 2.bxc4#
- threat
- 1.Rd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(g);XB(I)::S(E),XR(g)
- B(a);CHECK,XP(C)::S(E),XB(a)
- S(e);OGATE,XB(H)::QAR2(J),XS(e)
- Tries
- Try
- B(I);
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,XP(C)::S(E),XB(a)
- R(g);XB(H)::QAR1(J),XS(e)
- R(g);N_GUARD::S(E),XR(g)
- Refutation
- S(e);XB(H)
- Try
- B(I);
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,XP(C)::S(E),XB(a)
- R(g);XB(H)::QAR1(J),XS(e)
- R(g);N_GUARD::S(E),XR(g)
- Refutation
- S(e);XB(H)
- Try
- R(A);P_PINS(b)
- Threat
- R(A),XS(b)
- Vars
- B(a);CHECK,XP(C)::S(E),XB(a)
- S(e);N_GUARD,XS(E)::P(C)
- S(e);N_GUARD,XP(F)::P(C)
- S(e);OGATE,XB(H)::QAR2(J),XS(e)
- S(e);OGATE::P(B),XS(e)
- Refutation
- R(g);XB(I)
- Try
- R(K);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,XP(C)::S(E),XB(a)
- R(g);XB(I)::S(E),XR(g)
- R(g);::B(H)
- S(b);::B(H)
- S(e);::B(H)
- Refutation
- S(e);XP(F)
- Try
- Q(J);
- Threat
- QAR(J),XS(b)
- Vars
- B(a);CHECK,XP(C)::QAB(J)+S(E),DCHECK,XB(a)
- R(g);XB(I)::QAB(J)+S(E),DCHECK,XR(g)
- S(b);N_GUARD,XP(B)::QAB(J)+S(E),XS(e)
- S(b);OGATEB,P_SPINS(b),XS(E)::R(A)
- S(e);OGATEB,P_SPINS(e),XS(E)::R(K)
- S(e);N_GUARD,XP(F)::QAB(J)+S(E),XS(b)
- S(e);N_GUARD,XB(H)::QAB(J)+S(E),XS(b)
- S(b);N_GUARD::QAB(J)+S(E),XS(e)
- S(e);N_GUARD::QAB(J)+S(E),XS(b)
- Refutation
- S(b);
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,XP(C)::S(E),XB(a)
- R(g);XB(I)::S(E),XR(g)
- S(e);XP(F)::QAR1(J)
- S(e);XB(H)::QAR1(J)
- S(b);::QAR1(J),XS(e)
- S(b);::QAR2(J)
- S(e);::QAR2(J)
- Refutation
- P(c);XQ(J)
- Try
- Q(J);
- Threat
- B(H)
- Vars
- B(a);CHECK,XP(C)::S(E),XB(a)
- R(g);XB(I)::S(E),XR(g)
- S(e);OGATE,XB(H)::QAR2(J),XS(e)
- Refutation
- R(g);
- Try
- Actual
- R(K);P_PINS(e)
- Threat
- R1(K),XS(e)
- Vars
- B(a);CHECK,XP(C)::S(E),XB(a)
- R(g);XB(I)::S(E),XR(g)
- S(b);N_GUARD,XS(E)::P(C)
- R(g);N_GUARD::QAB(J)
- S(b);OGATE::P(B),XS(b)
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).