MESON Chess Problem Database
Problem Display
PID: 16568 (b2R4/2N1pp2/3b3B/npq2B2/2P1P3/r2kp1N1/1Q6/2R3nK w - - 0 1)
Larsen, Karl Adolf Koefoed
1st Prize, DSK 21. TT, 1941
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Qc2#
- 1...Qxc4
- 2.Rd1#
- 1...Qd5
- 2.exd5#
- 1...Ra1
- 2.Qc3#
- 1...Ra2
- 2.Qc3#
- 1...Rc3
- 2.Qxc3#
- 1...Ra4
- 2.Qc3#
- 1...Bxe4+
- 2.Bxe4#
- 1...Bd5
- 2.exd5#
- 1...Sb3
- 2.Qc3#
- 1...Sc6
- 2.e5#
- 1...Sb7
- 2.e5#
- 1...e2
- 2.Qd2#
- 1...bxc4
- 2.Rd1#
- 1...Qd4
- Tries
- 1.Sxb5?
- threat
- 2.Qc2#
- 1...Bxe4+
- 2.Bxe4#
- 1...Qxc4
- 2.Rd1#
- 1...Rc3
- 2.Rxc3#
- 2.Qxc3#
- 1...Ra2
- 2.Rc3#
- 2.Qc3#
- 1...Qxb5!
- threat
- 1.Sd5?
- threat
- 2.Sf4#
- 2.e5#
- 1...Qxc4
- 2.Sf4#
- 2.Rd1#
- 1...Qxd5
- 2.exd5#
- 1...Bxd5
- 2.exd5#
- 1...Rc3
- 2.Qxc3#
- 1...Qd4
- 2.Qc2#
- 1...Qc8
- 2.Sb4#
- 2.Sf4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 2.e5#
- 1...Be5
- 2.Sb4#
- 2.Sf4#
- 1...Se2
- 2.e5#
- 1...Sh3
- 2.e5#
- 1...e2
- 2.Qd2#
- 2.e5#
- 1...e6
- 2.Sf4#
- 1...e5!
- threat
- 1.Se6?
- threat
- 2.Sf4#
- 2.Sxc5#
- 2.Qc2#
- 1...Bxe4+
- 2.Bxe4#
- 1...Qxc4
- 2.Sf4#
- 2.Rd1#
- 1...Qxf5
- 2.Qd4#
- 2.Qc2#
- 1...Rc3
- 2.Rxc3#
- 2.Qxc3#
- 1...Qb4
- 2.Sf4#
- 2.Qd4#
- 2.Qc2#
- 1...Qd4
- 2.Qxd4#
- 2.Qc2#
- 1...Qb6
- 2.Sf4#
- 2.Qc2#
- 1...Qa7
- 2.Sf4#
- 2.Qc2#
- 1...Qd5
- 2.Qc2#
- 2.exd5#
- 1...Qe5
- 2.Qc2#
- 1...Qc6
- 2.Sf4#
- 2.Qd4#
- 2.Qc2#
- 1...Qc7
- 2.Sf4#
- 2.Qd4#
- 2.Qc2#
- 1...Qc8
- 2.Sf4#
- 2.Qd4#
- 2.Qc2#
- 1...Ra2
- 2.Sf4#
- 2.Sxc5#
- 2.Rc3#
- 2.Qc3#
- 1...Bd5
- 2.Qc2#
- 2.exd5#
- 1...Se2
- 2.Sxc5#
- 2.Qc2#
- 2.Qxe2#
- 1...Sh3
- 2.Sxc5#
- 2.Qc2#
- 2.Qe2#
- 1...Sb3
- 2.Sf4#
- 2.Rc3#
- 2.Qc3#
- 2.Qc2#
- 1...Sb7
- 2.Sf4#
- 2.Qc2#
- 2.e5#
- 1...e2
- 2.Sxc5#
- 2.Qb1#
- 2.Qc2#
- 2.Qd2#
- 1...fxe6!
- threat
- 1.Qb1+?
- 1...Kd2
- 2.Qc2#
- 1...Kd4!
- 1...Kd2
- 1.Sxb5?
- Keys
- 1.Sa6!
- threat
- 2.Sxc5#
- 1...Bxe4+
- 2.Bxe4#
- 1...Qxc4
- 2.Rd1#
- 1...Qxf5
- 2.Sb4#
- 1...Rc3
- 2.Qxc3#
- 1...Qb4
- 2.Sxb4#
- 1...Qd4
- 2.Qc2#
- 1...Qb6
- 2.Sb4#
- 1...Qa7
- 2.Sb4#
- 1...Qd5
- 2.exd5#
- 1...Qe5
- 2.Sb4#
- 1...Qc6
- 2.Sb4#
- 1...Qc7
- 2.Sb4#
- 1...Qc8
- 2.Sb4#
- 1...Bd5
- 2.exd5#
- 1...Sb3
- 2.Qc3#
- 1...Sb7
- 2.e5#
- threat
- 1.Sa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 6
- Sets
- Q(g);N_SPINB(h),SBLOCK::QAB1(C)
- Q(g);SBLOCK,XP(E)::R(A)
- Q(g);N_SPINB(h)::B(G)+P(F),XQ(g)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- B(k);CHECK,N_SPINB(h),OGATE,P_SPINB(k),XP(F)::B(G),XB(k)
- B(k);N_SPINB(h)::B(G)+P(F),XB(k)
- S(e);S_CUTR(b)::QAR1(C)
- S(e);N_PINP(F)::B(G)+P(F)
- P(d);N_GUARD::QAR1(C)
- P(f);SBLOCK,XP(E)::R(A)
- Tries
- Try
- S(I);XP(f)
- Threat
- QAB1(C)
- Vars
- B(k);CHECK,N_SPINB(h),OGATE,P_SPINB(k),XP(F)::B(G),XB(k)
- Q(g);SBLOCK,XP(E)::R(A)
- Refutation
- Q(g);XS(I)
- Try
- S(I);N_PINB(h),N_SPINP(F)
- Threat
- DUALS(2)
- Vars
- Q(g);OGATE,P_PINP(F),XS(I)::B(G)+P(F),XQ(g)
- B(k);OGATE,P_PINP(F),XS(I)::B(G)+P(F),XB(k)
- R(b);N_GUARD::QAR1(C),XR(b)
- Q(g);SBLOCK::QAB1(C)
- S(a);::B(G)+P(F)
- P(i);::S(I)
- Refutation
- P(i);
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- B(k);CHECK,N_SPINB(h),OGATE,P_SPINB(k),XP(F)::B(G),XB(k)
- Q(g);::QAB1(C)
- Refutation
- P(j);XS(I)
- Try
- Q(C);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINP(d)::QAR1(C)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- S(I);
- Threat
- S(I),XQ(g)
- Vars
- B(k);CHECK,N_SPINB(h),OGATE,P_SPINB(k),XP(F)::B(G),XB(k)
- Q(g);SBLOCK,XP(E)::R(A)
- Q(g);N_GUARD,XB(G)::S(I)
- R(b);N_GUARD::QAR1(C),XR(b)
- Q(g);N_GUARD::S(I),XQ(g)
- Q(g);N_SPINB(h),SBLOCK::QAB1(C)
- Q(g);N_GUARD::S(I)
- Q(g);N_SPINB(h)::B(G)+P(F),XQ(g)
- B(k);N_SPINB(h)::B(G)+P(F),XB(k)
- S(e);S_CUTR(b)::QAR1(C)
- S(e);N_PINP(F)::B(G)+P(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).