MESON Chess Problem Database
Problem Display
PID: 213006 (1B1Rbq2/3p4/1KPrp3/3k4/BppN3r/2P1Q3/3N2p1/3R4 w - - 0 1)
Jenson, Verner Skovlund
Stella Polaris, 1967
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Qe4#
- 1...Rh2
- 2.Qe4#
- 1...Rh3
- 2.Qe4#
- 1...Rxd4
- 2.Qxd4#
- 1...Re4
- 2.Qxe4#
- 1...Rh5
- 2.Qe4#
- 1...Rh6
- 2.Qe4#
- 1...Rh7
- 2.Qe4#
- 1...Rh8
- 2.Qe4#
- 1...Rxc6+
- 2.Bxc6#
- 1...dxc6
- 2.Qxe6#
- 1...Rh1
- Tries
- 1.Sc2?
- threat
- 2.Sxb4#
- 2.Qc5#
- 1...Rxc6+
- 2.Bxc6#
- 1...bxc3
- 2.Sb4#
- 2.Qc5#
- 1...Re4
- 2.Qc5#
- 2.Qxe4#
- 1...g1Q
- 2.Sxb4#
- 1...g1B
- 2.Sxb4#
- 1...Qf2
- 2.Sxb4#
- 1...Rd4
- 2.Sxb4#
- 2.Qxd4#
- 1...b3
- 2.Sb4#
- 2.Qc5#
- 1...e5!
- threat
- 1.S4f3?
- threat
- 2.Se4#
- 2.Qc5#
- 2.Qe5#
- 1...Rxc6+
- 2.Bxc6#
- 1...Qxf3
- 2.Qc5#
- 1...e5
- 2.Qxe5#
- 1...g1B
- 2.Se4#
- 1...g1R
- 2.Qc5#
- 2.Qe5#
- 1...Qg7
- 2.Qc5#
- 1...Qf4
- 2.Se4#
- 2.Qc5#
- 1...Qf5
- 2.Se4#
- 2.Qc5#
- 1...Qf6
- 2.Qc5#
- 1...Qh8
- 2.Qc5#
- 1...Rh1
- 2.Sf1#
- 2.Qd4#
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 1...Rd4
- 2.Qxd4#
- 2.Qe5#
- 1...Re4
- 2.Sxe4#
- 2.Qc5#
- 2.Qxe4#
- 1...Rh5
- 2.Sb1#
- 2.Sf1#
- 2.Sb3#
- 2.Se4#
- 2.Qd4#
- 2.Qc5#
- 2.Qe4#
- 1...g1Q!
- threat
- 1.Sb5?
- threat
- 2.Sc7#
- 2.Qc5#
- 1...Re4
- 2.Qc5#
- 2.Qxe4#
- 1...e5
- 2.Sc7#
- 1...g1Q
- 2.Sc7#
- 1...g1B
- 2.Sc7#
- 1...Qf2
- 2.Sc7#
- 1...Rd4
- 2.Sc7#
- 2.Qxd4#
- 1...Rxc6+!
- threat
- 1.Bb5?
- threat
- 2.Bxc4#
- 1...Rxc6+
- 2.Bxc6#
- 1...Rxd4
- 2.Qxd4#
- 1...Re4
- 2.Qxe4#
- 1...Qf1!
- threat
- 1.Qf3+?
- 1...Ke5
- 2.Sxc4#
- 1...Re4
- 2.Qxe4#
- 1...Qxf3!
- 1...Ke5
- 1.Sc2?
- Keys
- 1.Sxe6!
- threat
- 2.Sc7#
- 1...Rxc6+
- 2.Bxc6#
- 1...Rxe6
- 2.Se4#
- 1...dxe6
- 2.Qc5#
- 1...Re4
- 2.Qxe4#
- threat
- 1.Sxe6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- R(d);N_GUARD::QAB1(D)
- R(d);OGATE,XS(F)::QAR1(D),XR(d)
- R(d);N_GUARD::QAB1(D),XR(d)
- R(f);CHECK,OGATE,P_SPINP(h),XP(H)::B(E),XR(f)
- P(h);N_GUARD,P_SPINR(f),XP(H)::QAB1(D),XP(g)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(f);CHECK,OGATE,P_SPINP(h),XP(H)::B(E),XR(f)
- P(a);P_PINQ(D)::S(F),XP(b)
- Q(j);P_PINQ(D)::S(F),XP(b)
- Refutation
- P(g);
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- R(f);CHECK,OGATE,P_SPINP(h),XP(H)::B(E),XR(f)
- Q(j);XS(F)::QAR1(D)
- P(g);::QAR1(D),XP(g)
- P(a);P_PINQ(D)::R(A)+S(B)
- Q(j);::QAR1(D)
- Refutation
- P(a);P_PINQ(D)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- P(g);::S(F)
- P(a);P_PINQ(D)::S(F)
- Q(j);P_PINQ(D)::S(F)
- Refutation
- R(f);CHECK,P_SPINP(h),XP(H)
- Try
- B(E);
- Threat
- B(E),XP(c)
- Vars
- R(f);CHECK,OGATE,P_SPINP(h),XP(H)::B(E),XR(f)
- R(d);OGATE,XS(F)::QAR1(D),XR(d)
- R(d);N_GUARD::QAB1(D),XR(d)
- Refutation
- Q(j);
- Try
- Q(D);CHECK
- Vars
- K(e);P-FLIGHT,P_SPINR(f)::S(B),XP(c)
- R(d);N_GUARD,P_SPINR(d)::QAB1(D),XR(d)
- Refutation
- Q(j);XQ(D)
- Try
- Actual
- S(F);XP(g)
- Threat
- S(F)
- Vars
- R(f);CHECK,OGATE,P_SPINP(h),XP(H)::B(E),XR(f)
- R(f);P_SPINP(h),SBLOCK,XS(F)::R(A)+S(B)
- P(h);P_SPINR(f),SBLOCK,XS(F)::QAR1(D)
- R(d);N_GUARD::QAB1(D),XR(d)
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).