MESON Chess Problem Database
Problem Display
PID: 202280 (4N3/2p4n/6pr/3R1Ppb/1pP1k3/1p2P1Qp/1K1Prp1P/n4N2 w - - 0 1)
Andersen, Erik
Larsen, Karl Adolf Koefoed
6th HM., Il Secolo, 1923
#2
10 + 13
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.d3#
- 1...Rxd2+
- 2.Sxd2#
- 1...Rxe3
- 2.Qxe3#
- 1...Bf3
- 2.Qe5#
- 1...Bg4
- 2.Qxg4#
- 1...Sc2
- 2.d3#
- 1...Sf6
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- 1...g4
- 2.Qf4#
- 1...gxf5
- 2.Rd4#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Re1
- Tries
- 1.Kb1?
- threat
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...Rxe3
- 2.Qxe3#
- 1...Re1+!
- threat
- 1.Sg7?
- threat
- 2.Rd4#
- 1...Rxd2+
- 2.Sxd2#
- 1...Rxe3
- 2.Qxe3#
- 1...Sc2
- 2.d3#
- 1...c5!
- threat
- 1.Qxf2?
- threat
- 2.Sg3#
- 1...Rxd2+
- 2.Sxd2#
- 1...Rxe3
- 2.Qxe3#
- 1...Rxf2!
- threat
- 1.Qg2+?
- 1...Bf3
- 2.Sg3#
- 1...hxg2!
- 1...Bf3
- 1.Qf3+?
- 1...Bxf3
- 2.Sg3#
- 1...Kxf3!
- 1...Bxf3
- 1.fxg6?
- 1...Rxd2+
- 2.Sxd2#
- 1...Rxe3
- 2.Qxe3#
- 1...Bxg6
- 2.Qg4#
- 1...Re1
- 2.d3#
- 1...Bf3
- 2.Qe5#
- 1...Bg4
- 2.Qxg4#
- 1...Sc2
- 2.d3#
- 1...Sf6
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- 1...g4
- 2.Qf4#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Rxg6!
- 1...Rxd2+
- 1.f6?
- 1...Rxd2+
- 2.Sxd2#
- 1...Rxe3
- 2.Qxe3#
- 1...Sxf6
- 2.Sxf6#
- 1...Re1
- 2.d3#
- 1...Bf3
- 2.Qe5#
- 1...Bg4
- 2.Qxg4#
- 1...Sc2
- 2.d3#
- 1...g4
- 2.Qf4#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Sf8!
- 1...Rxd2+
- 1.Kb1?
- Keys
- 1.Qxh3!
- 1...Rxd2+
- 2.Sxd2#
- 1...Rxe3
- 2.Qxe3#
- 1...gxf5
- 2.Qxf5#
- 1...Re1
- 2.d3#
- 1...Bf3
- 2.Sg3#
- 1...Bg4
- 2.Qxg4#
- 1...Sc2
- 2.d3#
- 1...Sf6
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- 1...g4
- 2.Qg2#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Rxd2+
- 1.Qxh3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(b);N_PINP(C)::P(C)
- R(b);CHECK,XP(C)::S(A),XR(b)
- R(b);N_PINP(C),OGATE,XP(E)::QAR1(F),XR(b)
- B(i);SBLOCK::QAR1(F)
- B(i);N_GUARD::QAR2(F),XB(i)
- S(a);N_PINP(C)::P(C)
- S(m);N_GUARD::S(J),XS(m)
- S(m);N_GUARD::S(J)
- P(h);N_GUARD::QAR1(F)
- P(j);SBLOCK,XP(I)::R1(H)
- P(l);N_GUARD::S(J)
- Tries
- Try
- K(B);N_SPINP(C),P-FLIGHT
- Threat
- P(C)
- Vars
- R(b);XP(C)::S(A),XR(b)
- R(b);OGATE,XP(E)::QAR1(F),XR(b)
- Refutation
- R(b);CHECK
- Try
- S(J);
- Threat
- R1(H)
- Vars
- R(b);CHECK,XP(C)::S(A),XR(b)
- R(b);N_PINP(C),OGATE,XP(E)::QAR1(F),XR(b)
- S(a);N_PINP(C)::P(C)
- Refutation
- P(l);
- Try
- Q(F);XP(c)
- Threat
- S(A)
- Vars
- R(b);CHECK,XP(C)::S(A),XR(b)
- R(b);N_PINP(C),OGATE,XP(E)::QAR1(F),XR(b)
- Refutation
- R(b);XQ(F)
- Try
- Q(F);CHECK
- Vars
- B(i);P_SPINB(i)::S(A)
- Refutation
- P(e);XQ(F)
- Try
- Q(F);CHECK
- Vars
- B(i);SBLOCK,XQ(F)::S(A)
- Refutation
- K(g);S_FLIGHT,XQ(F)
- Try
- P(I);XP(j)
- Vars
- R(b);CHECK,XP(C)::S(A),XR(b)
- R(b);N_PINP(C),OGATE,XP(E)::QAR1(F),XR(b)
- B(i);N_GUARD,XP(I)::QAR2(F)
- R(b);N_PINP(C)::P(C)
- B(i);SBLOCK::QAR1(F)
- B(i);N_GUARD::QAR2(F),XB(i)
- S(a);N_PINP(C)::P(C)
- S(m);N_GUARD::S(J),XS(m)
- S(m);N_GUARD::S(J)
- P(h);N_GUARD::QAR1(F)
- P(l);N_GUARD::S(J)
- Refutation
- R(k);XP(I)
- Try
- P(I);
- Vars
- R(b);CHECK,XP(C)::S(A),XR(b)
- R(b);N_PINP(C),OGATE,XP(E)::QAR1(F),XR(b)
- S(m);XP(I)::S(J),XS(m)
- R(b);N_PINP(C)::P(C)
- B(i);SBLOCK::QAR1(F)
- B(i);N_GUARD::QAR2(F),XB(i)
- S(a);N_PINP(C)::P(C)
- P(h);N_GUARD::QAR1(F)
- P(l);N_GUARD::S(J)
- Refutation
- S(m);
- Try
- Actual
- Q(F);XP(e)
- Vars
- R(b);CHECK,XP(C)::S(A),XR(b)
- R(b);N_PINP(C),OGATE,XP(E)::QAR1(F),XR(b)
- P(j);OGATE,XP(I)::QAB1(F),XP(j)
- R(b);N_PINP(C)::P(C)
- B(i);SBLOCK::S(A)
- B(i);N_GUARD::QAR2(F),XB(i)
- S(a);N_PINP(C)::P(C)
- S(m);N_GUARD::S(J),XS(m)
- S(m);N_GUARD::S(J)
- P(h);S_CUTB(i)::QAB(F)
- P(l);N_GUARD::S(J)
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).