MESON Chess Problem Database
Problem Display
PID: 73331 (2q5/4P2b/3p4/pBp3Rr/KN1k2r1/1np2Pn1/2Q5/2B1R1b1 w - - 0 1)
Hartong, Jan
Tijdschrift vd KNSB, 1942
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Qe6
- 2.Sc6#
- 1...Qc6
- 2.Sxc6#
- 1...Qb8
- 2.Sc6#
- 1...Qd8
- 2.Sc6#
- 1...Qf8
- 2.Sc6#
- 1...Qg8
- 2.Sc6#
- 1...Qh8
- 2.Sc6#
- 1...Re4
- 2.Qd3#
- 1...Rh1
- 2.Rd5#
- 1...Rh2
- 2.Rd5#
- 1...Rh3
- 2.Rd5#
- 1...Rh4
- 2.Rd5#
- 1...Rh6
- 2.Rd5#
- 1...Bf2
- 2.Qxf2#
- 1...Bh2
- 2.Be3#
- 2.Qf2#
- 1...Be3
- 2.Bxe3#
- 1...Bxc2
- 2.Sxc2#
- 1...Bd3
- 2.Qxd3#
- 1...Bg8
- 2.Qd3#
- 1...Se4
- 2.Qd3#
- 1...Sf5
- 2.Rxg4#
- 2.Qd3#
- 1...Qe6
- Tries
- 1.Rd1+?
- 1...Bd3
- 2.Rxd3#
- 2.Qxd3#
- 1...Sd2!
- 1...Bd3
- 1.Re4+?
- 1...Rxe4
- 2.Qd3#
- 1...Sxe4
- 2.Qd3#
- 1...Bxe4!
- 1...Rxe4
- 1.Qd1+?
- 1...Bd3
- 2.Sc2#
- 2.Qxd3#
- 1...Sd2!
- 1...Bd3
- 1.Qxb3?
- threat
- 2.Qc4#
- 2.Qd5#
- 1...Rgxg5
- 2.Qc4#
- 1...Rhxg5
- 2.Qc4#
- 1...cxb4
- 2.Qd5#
- 1...Qf5
- 2.Sc6#
- 2.Qc4#
- 1...Qe6
- 2.Sc6#
- 1...Qb7
- 2.Qc4#
- 1...Qc6
- 2.Sxc6#
- 2.Qc4#
- 1...Qa8
- 2.Qc4#
- 1...Qg8
- 2.Sc6#
- 1...Bc2
- 2.Sxc2#
- 1...Bd3
- 2.Qd5#
- 1...Be4
- 2.Qc4#
- 1...Bg8
- 2.Sc2#
- 2.Rd1#
- 2.Qd1#
- 1...c2
- 2.Bb2#
- 2.Qc4#
- 2.Qb2#
- 1...d5
- 2.Qxd5#
- 1...c4!
- threat
- 1.Qe4+?
- 1...Rxe4
- 2.Sc2#
- 1...Sxe4
- 2.Sc2#
- 1...Bxe4!
- 1...Rxe4
- 1.Qxh7?
- threat
- 2.Sc2#
- 2.Qd3#
- 2.Qg7#
- 1...Rgxg5
- 2.Qd3#
- 1...Rhxg5
- 2.Qd3#
- 1...Rxh7
- 2.Sc2#
- 2.Rd5#
- 1...Sxc1
- 2.Sc2#
- 2.Qg7#
- 1...axb4
- 2.Qd3#
- 2.Qg7#
- 1...cxb4
- 2.Qd3#
- 2.Qg7#
- 1...c2
- 2.Bb2#
- 2.Qd3#
- 2.Qg7#
- 1...Qe6
- 2.Sc2#
- 2.Sc6#
- 2.Qd3#
- 1...Qf8
- 2.Sc2#
- 2.Sc6#
- 2.Qd3#
- 1...Qg8
- 2.Sc2#
- 2.Sc6#
- 2.Qd3#
- 1...Qh8
- 2.Sc2#
- 2.Sc6#
- 2.Qd3#
- 1...Re4
- 2.Sc2#
- 1...Rf4
- 2.Sc2#
- 2.Qd3#
- 1...Rh2
- 2.Rd5#
- 2.Qd3#
- 2.Qg7#
- 1...Rh6
- 2.Sc2#
- 2.Rd5#
- 2.Qd3#
- 1...Sa1
- 2.Rd1#
- 2.Qd3#
- 2.Qg7#
- 1...Se4
- 2.Sc2#
- 1...Sf5
- 2.Rxg4#
- 1...c4
- 2.Sc2#
- 2.Qg7#
- 1...Qf5!
- threat
- 1.Qd2+?
- 1...Bd3
- 2.Sc2#
- 2.Qxd3#
- 1...cxd2
- 2.Bb2#
- 1...Sxd2!
- 1...Bd3
- 1.Rd1+?
- Keys
- 1.Qh2!
- threat
- 2.Qxg1#
- 1...Rxh2
- 2.Rd5#
- 1...Bxh2
- 2.Be3#
- 1...c2
- 2.Bb2#
- 1...Qe6
- 2.Sc6#
- 1...Re4
- 2.Sc2#
- 1...Bf2
- 2.Qxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sf1
- 2.Qxd6#
- 1...Sh1
- 2.Qxd6#
- 1...Se2
- 2.Qxd6#
- 1...Se4
- 2.Sc2#
- 1...Sf5
- 2.Rxg4#
- threat
- 1.Qh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 13
- Sets
- Q(l);N_GUARD::S(F)
- Q(l);N_GUARD,P_PINB(G)::S(F),XQ(l)
- R(f);S_CUTB(k)::QAR1(C)
- R(i);N_GUARD::R1(H)
- B(a);N_GUARD::QAB(C),XB(a)
- B(a);N_GUARD::B(A),XB(a)
- B(k);XQ(C)::S(F),XB(k)
- B(k);N_GUARD::QAR1(C),XB(k)
- B(k);N_GUARD::QAR1(C)
- S(d);S_CUTB(k)::QAR1(C)
- Tries
- Try
- R(B);CHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- R(B);CHECK
- Vars
- R(f);XR(B)::QAR1(C)
- S(d);XR(B)::QAR1(C)
- Refutation
- B(k);XR(B)
- Try
- Q(C);CHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- Q(C);XS(b)
- Threat
- DUALS(2)
- Vars
- R(f);XR(H)::QAR1(C)
- R(i);XR(H)::QAR1(C)
- P(h);XS(F)::QAR1(C)
- Q(l);N_GUARD::S(F)
- Q(l);::QAR1(C)
- B(k);N_GUARD,P_PINQ(C)::S(F),XB(k)
- B(k);::QAR1(C)
- P(j);::QAR1(C),XP(j)
- Refutation
- P(h);
- Try
- Q(C);CHECK
- Vars
- R(f);XQ(C)::S(F)
- S(d);XQ(C)::S(F)
- Refutation
- B(k);XQ(C)
- Try
- Q(C);XB(k)
- Threat
- DUALS(3)
- Vars
- R(f);XR(H)::QAR1(C)
- R(i);XR(H)::QAR1(C)
- R(f);::S(F)
- S(d);::S(F)
- S(d);N_GUARD,S_CUTQ(l)::R(H),XR(f)
- Refutation
- Q(l);
- Try
- Q(C);CHECK
- Vars
- P(c);S_CUTB(k),S_CUTS(b),XQ(C)::B(A)
- Refutation
- S(b);XQ(C)
- Try
- Actual
- Q(C);
- Threat
- QAB(C),XB(a)
- Vars
- R(i);N_GUARD,XQ(C)::R1(H)
- B(a);N_GUARD,XQ(C)::B(A)
- P(c);OGATEB::B(A)
- Q(l);N_GUARD::S(F)
- R(f);S_CUTB(k)::S(F)
- B(a);N_GUARD::QAB(C),XB(a)
- B(a);N_GUARD::B(A),XB(a)
- S(d);OGATE::QAR2(C),XP(j)
- S(d);S_CUTB(k)::S(F)
- S(d);N_GUARD,S_CUTB(k),S_CUTQ(l)::R(H),XR(f)
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).