MESON Chess Problem Database
Problem Display
PID: 238759 (1nQ5/p7/pP2R3/1PNk4/r2N3q/rP6/b1PRP3/3Kb3 w - - 0 1)
Hermanson, Halvar
L'Italia Scacchistica, 1964
#2
11 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qf2
- 2.e4#
- 1...Qg3
- 2.e4#
- 1...Qg5
- 2.e4#
- 1...Qf6
- 2.e4#
- 1...Qe7
- 2.e4#
- 1...Qd8
- 2.e4#
- 1...Qh2
- 2.e4#
- 1...Qh3
- 2.e4#
- 1...Qxd4
- 2.e4#
- 1...Qh6
- 2.e4#
- 1...Qh8
- 2.e4#
- 1...Rxd4
- 2.c4#
- 1...Ra5
- 2.c4#
- 1...Sc6
- 2.Qxc6#
- 1...Sd7
- 2.Qc6#
- 1...Qf2
- Tries
- 1.Sf3+?
- 1...Qd4
- 2.e4#
- 1...Rd4
- 2.c4#
- 1...Bxd2!
- 1...Qd4
- 1.Sf5+?
- 1...Qd4
- 2.Se3#
- 2.Se7#
- 2.e4#
- 1...Rd4
- 2.Se3#
- 2.c4#
- 1...Bxd2!
- 1...Qd4
- 1.Sd3?
- threat
- 2.Qc5#
- 1...Kxd4
- 2.Sxe1#
- 2.Qc5#
- 1...Qxd4
- 2.Sf4#
- 1...Rxd4
- 2.Sb4#
- 1...Qe7
- 2.Sf4#
- 1...Rc4
- 2.Qxc4#
- 1...Sc6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...axb6!
- threat
- 1.Sxa4?
- threat
- 2.Sc3#
- 2.Qc4#
- 2.Qc5#
- 2.c4#
- 1...Qxd4
- 2.Sc3#
- 2.Qc4#
- 2.c4#
- 2.e4#
- 1...Rxb3
- 2.Qc5#
- 2.c4#
- 1...Bxd2
- 2.Qc4#
- 2.Qc5#
- 1...Bxb3
- 2.Sc3#
- 2.Qc5#
- 1...axb5
- 2.Sc3#
- 2.Qc5#
- 1...axb6
- 2.Sc3#
- 2.Sxb6#
- 2.Qc4#
- 2.c4#
- 1...Qg3
- 2.Qc4#
- 2.Qc5#
- 2.c4#
- 2.e4#
- 1...Qe7
- 2.Sc3#
- 2.Qc4#
- 2.c4#
- 2.e4#
- 1...Qh3
- 2.Qc4#
- 2.Qc5#
- 2.c4#
- 2.e4#
- 1...Sc6
- 2.Qd7#
- 2.Qxc6#
- 2.c4#
- 1...Sd7
- 2.Sc3#
- 2.Qb7#
- 2.Qxd7#
- 2.Qc4#
- 2.Qc6#
- 2.Qa8#
- 2.c4#
- 1...Rxa4!
- threat
- 1.Se4?
- threat
- 2.Sc3#
- 2.Qc5#
- 1...Rxb3
- 2.Qc5#
- 1...Rxd4
- 2.Sc3#
- 2.Qc4#
- 2.c4#
- 1...Bxd2
- 2.Qc5#
- 1...axb6
- 2.Sc3#
- 1...Qg3
- 2.Sf6#
- 2.Qc5#
- 1...Qe7
- 2.Sc3#
- 1...Qh3
- 2.Sf6#
- 2.Qc5#
- 1...Rc4
- 2.Qxc4#
- 1...Sc6
- 2.Qd7#
- 2.Qxc6#
- 1...Sd7
- 2.Sc3#
- 2.Qb7#
- 2.Qxd7#
- 2.Qc6#
- 2.Qa8#
- 1...Qxe4!
- threat
- 1.Sxa6?
- threat
- 2.Qc5#
- 1...Qxd4
- 2.e4#
- 1...Rxd4
- 2.Sb4#
- 2.Qc4#
- 2.c4#
- 1...Rxa6
- 2.Qc4#
- 2.c4#
- 1...Sxa6
- 2.Qc6#
- 1...Qe7
- 2.e4#
- 1...Rc4
- 2.Qxc4#
- 1...Sc6
- 2.Qd7#
- 2.Qxc6#
- 1...Sd7
- 2.Qb7#
- 2.Qxd7#
- 2.Qc6#
- 2.Qa8#
- 1...axb6!
- threat
- 1.Sb7?
- threat
- 2.Qc5#
- 1...Qxd4
- 2.e4#
- 1...Rxd4
- 2.Qc4#
- 2.c4#
- 1...Qe7
- 2.e4#
- 1...Rc4
- 2.Qxc4#
- 1...Sc6
- 2.Qd7#
- 2.Qxc6#
- 1...Sd7
- 2.Qxd7#
- 2.Qc6#
- 1...axb6!
- threat
- 1.Re5+?
- 1...Kd6
- 2.Qe6#
- 2.Qc7#
- 2.Qxb8#
- 1...Kxe5!
- 1...Kd6
- 1.Qb7+?
- 1...Sc6
- 2.Qxc6#
- 1...Kxc5!
- 1...Sc6
- 1.Qd7+?
- 1...Kxc5
- 2.Qd6#
- 1...Sxd7!
- 1...Kxc5
- 1.Sf3+?
- Keys
- 1.Sd7!
- threat
- 2.Qc5#
- 1...Qxd4
- 2.Sf6#
- 1...Rxd4
- 2.Qc4#
- 1...Sxd7
- 2.Qc6#
- 1...axb6
- 2.Sxb6#
- 1...Qe7
- 2.e4#
- 1...Rc4
- 2.Qxc4#
- 1...Sc6
- 2.Qxc6#
- threat
- 1.Sd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- Q(e);N_GUARD::P(D)
- Q(e);N_GUARD,P_PINR(C),P_SPINQ(e),XS(F)::P(D)
- R(d);N_GUARD,P_PINR(C),P_SPINR(d),XS(F)::P(B)
- R(d);N_GUARD::P(B)
- S(i);N_GUARD::QAB1(K),XS(i)
- S(i);N_GUARD::QAB1(K)
- Tries
- Try
- S(F);CHECK
- Vars
- Q(e);P_PINR(C),P_SPINQ(e)::P(D)
- R(d);P_PINR(C),P_SPINR(d)::P(B)
- Refutation
- B(a);XR(C)
- Try
- S(F);CHECK
- Refutation
- B(a);XR(C)
- Try
- S(H);
- Threat
- QAR1(K)
- Vars
- Q(e);N_GUARD,XS(F)::S(H)
- R(d);N_GUARD,XS(F)::S(H)
- Q(e);N_GUARD::S(H)
- R(d);N_GUARD::QAB1(K),XR(d)
- S(i);N_GUARD::QAR2(K)
- S(i);N_GUARD::QAR2(K),XS(i)
- Refutation
- P(h);XP(I)
- Try
- S(H);XR(d)
- Threat
- DUALS(4)
- Refutation
- R(c);XS(H)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(c);XP(E)::QAR1(K)
- B(a);XR(C)::QAR1(K)
- P(h);XP(I)::S(H)
- Q(e);::S(H)
- R(d);N_GUARD::QAB1(K),XR(d)
- Refutation
- Q(e);XS(H)
- Try
- S(H);XP(g)
- Threat
- QAR1(K)
- Vars
- Q(e);N_GUARD,P_PINR(C),P_SPINQ(e),XS(F)::P(D)
- S(i);N_GUARD,XS(H)::QAB1(K)
- Q(e);N_GUARD::P(D)
- R(d);N_GUARD::QAB1(K),XR(d)
- Refutation
- P(h);XP(I)
- Try
- S(H);
- Threat
- QAR1(K)
- Vars
- Q(e);N_GUARD,P_PINR(C),P_SPINQ(e),XS(F)::P(D)
- Q(e);N_GUARD::P(D)
- R(d);N_GUARD::QAB1(K),XR(d)
- Refutation
- P(h);XP(I)
- Try
- R(J);CHECK
- Refutation
- K(f);P-FLIGHT,XR(J)
- Try
- Q(K);CHECK
- Vars
- S(i);N_GUARD,P_SPINS(i)::QAB1(K),XS(i)
- Refutation
- K(f);P-FLIGHT,XS(H)
- Try
- Q(K);CHECK
- Vars
- K(f);P-FLIGHT,XS(H)::QAB1(K)
- Refutation
- S(i);XQ(K)
- Try
- Actual
- S(H);
- Threat
- QAR1(K)
- Vars
- Q(e);N_GUARD,P_PINR(C),P_SPINQ(e),XS(F)::S(H)
- R(d);N_GUARD,P_PINR(C),P_SPINR(d),XS(F)::QAB1(K)
- S(i);N_GUARD,XS(H)::QAB1(K)
- P(h);XP(I)::S(H),XP(h)
- Q(e);N_GUARD::P(D)
- R(d);N_GUARD::QAB1(K),XR(d)
- S(i);N_GUARD::QAB1(K),XS(i)
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).