MESON Chess Problem Database
Problem Display
PID: 238747 (1N1r2B1/B7/R2Np3/3k3K/1ppP4/1n1RbP2/1q4Q1/8 w - - 0 1)
Hannelius, Jan Ingvar
L'Italia Scacchistica, 1952
#2
10 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.f4#
- 1...Qc1
- 2.f4#
- 1...Qa3
- 2.f4#
- 1...Qc3
- 2.f4#
- 1...Qxd4
- 2.f4#
- 1...Qb1
- 2.f4#
- 1...Bg1
- 2.Qg5#
- 1...Bd2
- 2.f4#
- 1...Bf2
- 2.Qg5#
- 2.f4#
- 1...Bxd4
- 2.Qg5#
- 1...Bg5
- 2.Qxg5#
- 1...Qa1
- Tries
- 1.Sxc4?
- threat
- 2.Sxe3#
- 2.Bxe6#
- 1...Qxd4
- 2.Bxe6#
- 1...Rxg8
- 2.Sxe3#
- 1...Bxd4
- 2.Bxe6#
- 1...Sxd4
- 2.Bxe6#
- 1...Qc1
- 2.Bxe6#
- 1...Qd2
- 2.Bxe6#
- 1...Qe2
- 2.Bxe6#
- 1...Qf2
- 2.Bxe6#
- 1...Rd6
- 2.Sxe3#
- 1...Re8
- 2.Sxe3#
- 1...Bc1
- 2.Bxe6#
- 1...Bg1
- 2.Bxe6#
- 1...Bd2
- 2.Bxe6#
- 1...Bf2
- 2.Bxe6#
- 1...Bf4
- 2.Bxe6#
- 1...Bg5
- 2.Bxe6#
- 1...Bh6
- 2.Bxe6#
- 1...Sc5
- 2.Sxe3#
- 1...Kxc4!
- threat
- 1.Se4?
- threat
- 2.Sf6#
- 2.Bxe6#
- 1...Rxg8
- 2.Sf6#
- 2.Rd6#
- 1...Bxd4
- 2.Qg5#
- 1...Sxd4
- 2.Ra5#
- 1...cxd3
- 2.Bxe6#
- 1...c3
- 2.Bxe6#
- 1...Rd6
- 2.Sf6#
- 2.Rxd6#
- 1...Re8
- 2.Sf6#
- 2.Rd6#
- 1...Rf8
- 2.Bxe6#
- 2.Rd6#
- 1...Bg5
- 2.Bxe6#
- 2.Qxg5#
- 1...Sc5
- 2.Sf6#
- 1...Qxd4!
- threat
- 1.Sb5?
- threat
- 2.Sc7#
- 2.Bxe6#
- 1...Qxd4
- 2.f4#
- 1...Rxg8
- 2.Sc7#
- 2.Rd6#
- 1...Bxd4
- 2.Qg5#
- 1...cxd3
- 2.Bxe6#
- 1...c3
- 2.Bxe6#
- 1...Rd6
- 2.Sc7#
- 2.Rxd6#
- 1...Rd7
- 2.Bxe6#
- 1...Rc8
- 2.Bxe6#
- 2.Rd6#
- 1...Re8
- 2.Sc7#
- 2.Rd6#
- 1...Bf4
- 2.Bxe6#
- 1...Sc5
- 2.Sc7#
- 1...Sxd4!
- threat
- 1.Sf5?
- threat
- 2.Sxe3#
- 2.Se7#
- 2.Bxe6#
- 1...Qxd4
- 2.f4#
- 1...Rxg8
- 2.Sxe3#
- 2.Se7#
- 2.Rd6#
- 1...Sxd4
- 2.Ra5#
- 1...cxd3
- 2.Sxe3#
- 2.Bxe6#
- 1...c3
- 2.Sxe3#
- 2.Bxe6#
- 1...Qc1
- 2.Se7#
- 2.Bxe6#
- 2.f4#
- 1...Qd2
- 2.Se7#
- 2.Bxe6#
- 1...Qe2
- 2.Se7#
- 2.Bxe6#
- 1...Qf2
- 2.Se7#
- 2.Bxe6#
- 1...Rd6
- 2.Sxe3#
- 2.Se7#
- 2.Rxd6#
- 1...Rd7
- 2.Sxe3#
- 2.Bxe6#
- 1...Re8
- 2.Sxe3#
- 2.Rd6#
- 1...Bc1
- 2.Se7#
- 2.Bxe6#
- 1...Bg1
- 2.Se7#
- 2.Bxe6#
- 1...Bd2
- 2.Se7#
- 2.Bxe6#
- 2.f4#
- 1...Bf2
- 2.Se7#
- 2.Bxe6#
- 2.f4#
- 1...Bf4
- 2.Se7#
- 2.Bxe6#
- 1...Bg5
- 2.Bxe6#
- 1...Bh6
- 2.Se7#
- 2.Bxe6#
- 1...Sc5
- 2.Sxe3#
- 2.Se7#
- 1...Bxd4!
- threat
- 1.Sb7?
- threat
- 2.Bxe6#
- 1...Qxd4
- 2.f4#
- 1...Rxg8
- 2.Rd6#
- 1...Bxd4
- 2.Qg5#
- 1...Sxd4
- 2.Ra5#
- 1...Rd6
- 2.Rxd6#
- 1...Re8
- 2.Rd6#
- 1...Sc5!
- threat
- 1.Se8?
- threat
- 2.Sf6#
- 2.Sc7#
- 2.Bxe6#
- 1...Qxd4
- 2.f4#
- 1...Bxd4
- 2.Qg5#
- 1...Sxd4
- 2.Ra5#
- 1...cxd3
- 2.Bxe6#
- 1...c3
- 2.Bxe6#
- 1...Rd6
- 2.Sf6#
- 2.Sc7#
- 2.Rxd6#
- 1...Rd7
- 2.Sf6#
- 2.Bxe6#
- 1...Rc8
- 2.Sf6#
- 2.Bxe6#
- 2.Rd6#
- 1...Bf4
- 2.Sf6#
- 2.Bxe6#
- 1...Bg5
- 2.Sc7#
- 2.Bxe6#
- 2.Qxg5#
- 1...Sc5
- 2.Sf6#
- 2.Sc7#
- 1...Rxe8!
- threat
- 1.Qh3?
- threat
- 2.Bxe6#
- 2.Qf5#
- 2.Qxe6#
- 1...Qxd4
- 2.Qf5#
- 2.Qxe6#
- 1...Rxd6
- 2.Qf5#
- 1...Bxd4
- 2.Qf5#
- 2.Qxe6#
- 1...Sxd4
- 2.Qf5#
- 2.Qxe6#
- 1...Qh2
- 2.Bxe6#
- 1...Re8
- 2.Qf5#
- 1...Rf8
- 2.Bxe6#
- 2.Qxe6#
- 1...Bf4
- 2.Bxe6#
- 2.Qxe6#
- 1...Sc5
- 2.Qf5#
- 1...Rxg8!
- threat
- 1.Qg4?
- threat
- 2.Bxe6#
- 2.Qf5#
- 2.Qxe6#
- 2.Qe4#
- 1...Qxd4
- 2.Qf5#
- 2.Qxe6#
- 2.Qe4#
- 1...Rxd6
- 2.Qf5#
- 2.Qe4#
- 1...Rxg8
- 2.Qe4#
- 1...Bxd4
- 2.Qf5#
- 2.Qxe6#
- 2.Qe4#
- 2.Qg5#
- 1...Sxd4
- 2.Qf5#
- 2.Qxe6#
- 2.Qe4#
- 1...Re8
- 2.Qf5#
- 2.Qe4#
- 1...Rf8
- 2.Bxe6#
- 2.Qxe6#
- 2.Qe4#
- 1...Bf4
- 2.Bxe6#
- 2.Qxe6#
- 1...Sd2
- 2.Bxe6#
- 2.Qf5#
- 2.Qxe6#
- 1...Sc5
- 2.Qf5#
- 1...Qh2+!
- threat
- 1.Qg6?
- threat
- 2.Bxe6#
- 2.Qe4#
- 2.Qf5#
- 2.Qxe6#
- 1...Qxd4
- 2.Qe4#
- 2.Qf5#
- 2.Qxe6#
- 1...Rxd6
- 2.Qe4#
- 2.Qf5#
- 1...Rxg8
- 2.Qe4#
- 1...Bxd4
- 2.Qe4#
- 2.Qf5#
- 2.Qg5#
- 2.Qxe6#
- 1...Sxd4
- 2.Qe4#
- 2.Qf5#
- 2.Qxe6#
- 1...Re8
- 2.Qe4#
- 2.Qf5#
- 1...Rf8
- 2.Bxe6#
- 2.Qe4#
- 2.Qxe6#
- 1...Bf4
- 2.Bxe6#
- 2.Qe4#
- 2.Qxe6#
- 1...Sd2
- 2.Bxe6#
- 2.Qf5#
- 2.Qxe6#
- 1...Sc5
- 2.Qf5#
- 1...Qh2+!
- threat
- 1.Sxc4?
- Keys
- 1.Sc8!
- threat
- 2.Se7#
- 2.Bxe6#
- 1...Qxd4
- 2.f4#
- 1...Rxc8
- 2.Bxe6#
- 1...Rxg8
- 2.Se7#
- 2.Rd6#
- 1...Bxd4
- 2.Qg5#
- 1...Sxd4
- 2.Ra5#
- 1...cxd3
- 2.Bxe6#
- 1...c3
- 2.Bxe6#
- 1...Rd6
- 2.Se7#
- 2.Rxd6#
- 1...Rd7
- 2.Bxe6#
- 1...Re8
- 2.Rd6#
- 1...Bg5
- 2.Bxe6#
- 2.Qxg5#
- 1...Sc5
- 2.Se7#
- threat
- 1.Sc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 8
- Sets
- Q(a);N_GUARD::QAB(A)+P(C)
- Q(a);N_GUARD,P_SPINQ(a),XP(D)::QAB(A)+P(C)
- B(c);N_GUARD::QAR(A)
- B(c);S_CUTQ(a)::QAB(A)+P(C)
- B(c);N_GUARD,P_SPINB(c),XP(D)::QAR(A)
- B(c);N_GUARD::QAR(A),XB(c)
- Tries
- Try
- S(G);XP(e)
- Threat
- DUALS(2)
- Vars
- Q(a);P_SPINQ(a),XP(D)::B(J),XP(g)
- R(h);N_SPINP(g),XB(J)::S(G),XB(c)
- B(c);P_SPINB(c),XP(D)::B(J),XP(g)
- S(b);P_SPINS(b),XP(D)::B(J),XP(g)
- Q(a);::B(J),XP(g)
- Q(a);P_PINP(C)::B(J),XP(g)
- R(h);::S(G),XB(c)
- B(c);::B(J),XP(g)
- S(b);::S(G),XB(c)
- Refutation
- K(f);S_FLIGHT,XS(G)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD,P_SPINB(c),XP(D)::QAR(A)
- S(b);N_GUARD,P_SPINS(b),XP(D)::R(F)
- P(e);XR(B)::B(J),XP(g)
- P(e);::B(J),XP(g)
- S(b);::S(G)
- Refutation
- Q(a);P_SPINQ(a),XP(D)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XP(D)::QAB(A)+P(C)
- B(c);N_GUARD,P_SPINB(c),XP(D)::QAR(A)
- P(e);XR(B)::B(J),XP(g)
- P(e);::B(J),XP(g)
- R(h);::B(J),XP(g)
- B(c);::B(J),XP(g)
- S(b);::S(G)
- Refutation
- S(b);P_SPINS(b),XP(D)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XP(D)::QAB(A)+P(C)
- S(b);N_GUARD,P_SPINS(b),XP(D)::R(F)
- B(c);::B(J),XP(g)
- Refutation
- B(c);P_SPINB(c),XP(D)
- Try
- S(G);
- Threat
- B(J),XP(g)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XP(D)::QAB(A)+P(C)
- R(h);N_GUARD,N_SPINP(g),XB(J)::R1(F)
- B(c);N_GUARD,P_SPINB(c),XP(D)::QAR(A)
- S(b);N_GUARD,P_SPINS(b),XP(D)::R(F)
- R(h);N_GUARD::R1(F),XR(h)
- R(h);N_GUARD::R1(F)
- Refutation
- S(b);
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XP(D)::QAB(A)+P(C)
- B(c);N_GUARD,P_SPINB(c),XP(D)::QAR(A)
- S(b);N_GUARD,P_SPINS(b),XP(D)::R(F)
- P(e);XR(B)::B(J),XP(g)
- P(e);::B(J),XP(g)
- Refutation
- R(h);XS(G)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- R(h);XS(G)::QAR2(A)
- Q(a);P_PINQ(A)::B(J),XP(g)
- R(h);::QAR2(A)
- S(b);::QAR2(A)
- Refutation
- R(h);N_SPINP(g),XB(J)
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- R(h);N_SPINP(g),XB(J)::QAB1(A)
- S(b);::QAR2(A)
- Refutation
- Q(a);CHECK
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- R(h);N_SPINP(g),XB(J)::QAB1(A)
- S(b);::QAR2(A)
- Refutation
- Q(a);CHECK
- Try
- Actual
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XP(D)::QAB(A)+P(C)
- R(h);XS(G)::B(J),XP(g)
- B(c);N_GUARD,P_SPINB(c),XP(D)::QAR(A)
- S(b);N_GUARD,P_SPINS(b),XP(D)::R(F)
- P(e);XR(B)::B(J),XP(g)
- P(e);::B(J),XP(g)
- R(h);::B(J),XP(g)
- R(h);N_GUARD::R1(F)
- S(b);::S(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).