MESON Chess Problem Database
Problem Display
PID: 219389 (8/7p/1p1Q1K2/2N1Nb1p/1R2PkpP/3R4/7P/q1n1r1Bn w - - 0 1)
Svedberg, Erik Daniel
Svedberg, John Arvid
Tidskrift for Schack, 1977
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxe5+
- 2.Qxe5#
- 1...Qb1
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qa2
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qa3
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qa4
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qa5
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qa6
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qa7
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qa8
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Rd1
- 2.Be3#
- 1...Rf1
- 2.Be3#
- 1...Re3
- 2.Bxe3#
- 1...Rxe4
- 2.Be3#
- 1...Bxe4
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bg6
- 2.Se6#
- 1...Se2
- 2.Be3#
- 1...Sxd3
- 2.Sxd3#
- 1...Sg3
- 2.hxg3#
- 1...g3
- 2.Rf3#
- 1...Qxe5+
- Tries
- 1.Ke7?
- threat
- 2.Sg6#
- 1...Qa7+
- 2.Sed7#
- 1...Rxe4
- 2.Be3#
- 1...Bxe4
- 2.Qf6#
- 1...Sxd3
- 2.Scxd3#
- 1...Re3
- 2.Bxe3#
- 1...Bg6
- 2.Se6#
- 2.Sxg6#
- 1...g3
- 2.Rf3#
- 1...Qxe5+!
- threat
- 1.Rc3?
- threat
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Rxe4
- 2.Sf3#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 2.Be3#
- 2.Qd2#
- 1...bxc5
- 2.Sf3#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Rd1
- 2.Sg6#
- 2.Be3#
- 1...Re3
- 2.Bxe3#
- 1...Bg6
- 2.Se6#
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sxg6#
- 2.Sed7#
- 2.Sf7#
- 1...Bd7
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sexd7#
- 2.Sf7#
- 1...Sd3
- 2.Scxd3#
- 1...g3
- 2.Rf3#
- 1...Qxc3!
- threat
- 1.Rbd4?
- threat
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Sxd3
- 2.Scxd3#
- 1...Re3
- 2.Bxe3#
- 1...Bg6
- 2.Se6#
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sxg6#
- 2.Sed7#
- 2.Sf7#
- 1...Bd7
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sg6#
- 2.Sexd7#
- 2.Sf7#
- 1...g3
- 2.Rf3#
- 1...Qxd4!
- threat
- 1.Qf8?
- threat
- 2.Qh6#
- 1...h6
- 2.Qxh6#
- 1...Qxe5+!
- threat
- 1.Qe6?
- threat
- 2.Qxf5#
- 1...Qxe5+
- 2.Qxe5#
- 1...Bxe4
- 2.Qf5#
- 1...Bxe6
- 2.Sxe6#
- 1...Sg3
- 2.hxg3#
- 1...Bg6!
- threat
- 1.exf5+?
- 1...Re4
- 2.Se6#
- 2.Be3#
- 2.Rxe4#
- 1...Qd4!
- 1...Re4
- 1.Ke7?
- Keys
- 1.Kf7!
- threat
- 2.Sg6#
- 1...Qa2+
- 2.Sc4#
- 1...Qa7+
- 2.Sed7#
- 1...Be6+
- 2.Sxe6#
- 1...Bg6+
- 2.Sxg6#
- 1...Qxe5
- 2.Qh6#
- 1...Bxe4
- 2.Qf6#
- 1...Sxd3
- 2.Scxd3#
- 1...Re3
- 2.Bxe3#
- 1...g3
- 2.Rf3#
- threat
- 1.Kf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(H)::QAB1(I),XQ(a)
- R(c);N_GUARD::B(A)
- R(c);N_GUARD::B(A),XR(c)
- R(c);N_GUARD,P_SPINR(c),XP(E)::B(A)
- B(g);N_GUARD,P_SPINB(g),XP(E)::S(G)
- B(g);N_GUARD::S(G),XB(g)
- B(g);N_GUARD::S(G)
- S(b);S_CUTR(c)::B(A)
- S(b);XR(C)::S(G),XS(b)
- S(d);OGATE::P(B),XS(d)
- P(f);N_GUARD::R1(C)
- Tries
- Try
- K(J);N_SPINS(H),S_FLIGHT
- Threat
- QAB(I)+S(H),DCHECK
- Vars
- Q(a);CHECK,N_GUARD::QAB(I)+S(H)
- R(c);N_GUARD,P_PINS(H),P_SPINR(c),XP(E)::B(A)
- B(g);OGATEB,P_SPINB(g),XP(E)::QAR2(I)
- S(b);XR(C)::S(G),XS(b)
- R(c);N_GUARD::B(A),XR(c)
- P(f);N_GUARD::R1(C)
- Refutation
- Q(a);CHECK,P_SPINQ(a),XS(H)
- Try
- R(C);N_SPINS(H)
- Threat
- DUALS(6)
- Vars
- R(c);N_GUARD::B(A),XR(c)
- S(b);N_GUARD::S(G),XS(b)
- P(f);N_GUARD::R1(C)
- Refutation
- Q(a);P_PINS(H),XR(C)
- Try
- R(D);N_SPINS(H)
- Threat
- DUALS(6)
- Vars
- S(b);XR(C)::S(G),XS(b)
- R(c);N_GUARD::B(A),XR(c)
- P(f);N_GUARD::R1(C)
- Refutation
- Q(a);P_PINS(H),XR(D)
- Try
- Q(I);
- Threat
- QAB(I)
- Vars
- P(j);::QAB(I),XP(j)
- Refutation
- Q(a);CHECK,XS(H)
- Try
- Q(I);
- Threat
- QAR1(I),XB(g)
- Vars
- Q(a);CHECK,OGATE,XS(H)::QAB1(I),XQ(a)
- B(g);P_SPINB(g),XP(E)::QAR1(I)
- B(g);XQ(I)::S(G),XB(g)
- S(d);OGATE::P(B),XS(d)
- Refutation
- B(g);
- Try
- P(E);CHECK,XB(g)
- Refutation
- Q(a);P_SPINQ(a)
- Try
- Actual
- K(J);N_SPINS(H),P-FLIGHT
- Threat
- QAB(I)+S(H),DCHECK
- Vars
- Q(a);CHECK,N_GUARD::QAB(I)+S(H)
- B(g);CHECK,N_GUARD::S(G),XB(g)
- B(g);CHECK::QAB(I)+S(H),DCHECK,XB(g)
- Q(a);P_SPINQ(a),SBLOCK,XS(H)::QAB(I)
- B(g);OGATEB,P_SPINB(g),XP(E)::QAR2(I)
- S(b);XR(C)::S(G),XS(b)
- R(c);N_GUARD::B(A),XR(c)
- P(f);N_GUARD::R1(C)
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).