MESON Chess Problem Database
Problem Display
PID: 184994 (1bb1R3/1B3R1K/2r3Q1/2prNp1N/1nPpk1P1/3p4/3P3B/7n w - - 0 1)
May, G
Bulletin Ouvrier des Echecs, 1948
#2
11 + 11
| 15601 | Albrecht-Leiss-Degener Collection | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rd7
- 2.Sf6#
- 2.Qxf5#
- 1...Rd8
- 2.Sf6#
- 1...Re6
- 2.Qxf5#
- 1...Rf6
- 2.Sxf6#
- 1...Rc7
- 2.Sf6#
- 1...Bd6
- 2.Sf6#
- 1...Be6
- 2.Sf6#
- 1...Bxb7
- 2.Qxf5#
- 1...Rd7
- Tries
- 1.Sf3+?
- 1...Re5
- 2.Sg5#
- 1...Re6
- 2.Sg5#
- 2.Qxf5#
- 1...Be5
- 2.Sg5#
- 1...Be6
- 2.Sg5#
- 1...Kxf3!
- 1...Re5
- 1.Sd7+?
- 1...Re5
- 2.Qxf5#
- 1...Re6
- 2.Qxf5#
- 1...Be5
- 2.Qxf5#
- 1...Kf3!
- 1...Re5
- 1.Bxc8?
- threat
- 2.Bxf5#
- 2.Qxf5#
- 1...Rxe5
- 2.Qxf5#
- 1...Rxg6
- 2.Bxf5#
- 1...Rxc8
- 2.Sf6#
- 2.Qxf5#
- 1...Bxe5
- 2.Qxf5#
- 1...Rd7
- 2.Qxf5#
- 1...Re6
- 2.Qxf5#
- 1...Rf6
- 2.Sxf6#
- 1...Sg3!
- threat
- 1.Re6?
- threat
- 2.Sf6#
- 2.Qxf5#
- 1...Rxe5
- 2.Qxf5#
- 1...Rxe6
- 2.Qxf5#
- 1...Bxe5
- 2.Qxf5#
- 1...Bxe6
- 2.Sf6#
- 1...Sg3!
- threat
- 1.Qg5?
- threat
- 2.Qf4#
- 1...f4
- 2.Rxf4#
- 2.Qxf4#
- 1...Rh6+!
- threat
- 1.Qh6?
- threat
- 2.Qf4#
- 1...f4
- 2.Rxf4#
- 2.Qxf4#
- 1...Rxh6+!
- threat
- 1.gxf5?
- threat
- 2.Qg2#
- 2.Qg4#
- 1...Bxf5
- 2.Qxf5#
- 1...Sg3
- 2.Qg4#
- 1...Rf6
- 2.Sxf6#
- 2.Qg4#
- 1...Sf2
- 2.Qg2#
- 1...Rxg6!
- threat
- 1.Sf3+?
- Keys
- 1.Rxf5!
- threat
- 2.Rf4#
- 1...Rd7+
- 2.Rf7#
- 1...Rc7+
- 2.Sd7#
- 1...Bxf5
- 2.Qxf5#
- 1...Re6
- 2.Rf6#
- 1...Be6
- 2.Sf6#
- threat
- 1.Rxf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- R(g);P_SPINR(i)::S(F)
- R(i);P_SPINR(g),S_CUTB(k)::QAB1(G),XP(h)
- R(i);N_GUARD,P_SPINR(g)::S(F),XR(i)
- R(i);N_GUARD,P_PINR(I),P_SPINR(g)::S(F)
- B(j);S_CUTR(i)::S(F)
- B(k);S_CUTR(i)::S(F)
- B(k);N_GUARD,XB(H)::QAB1(G),XP(h)
- Tries
- Try
- S(E);CHECK
- Vars
- R(g);P_SPINR(g)::S(E)
- B(j);P_SPINB(j)::S(E)
- B(k);P_SPINB(k)::S(E)
- Refutation
- K(e);S_FLIGHT,XS(E)
- Try
- S(E);CHECK
- Vars
- R(g);P_SPINR(g)::QAB1(G),XP(h)
- R(i);P_SPINR(g)::QAB1(G),XP(h)
- B(j);P_SPINB(j)::QAB1(G),XP(h)
- Refutation
- K(e);S_FLIGHT
- Try
- B(H);XB(k)
- Threat
- DUALS(2)
- Vars
- R(g);P_SPINR(g),XS(E)::QAB1(G),XP(h)
- R(i);N_SPINP(h),XQ(G)::B(H),XP(h)
- B(j);P_SPINB(j),XS(E)::QAB1(G),XP(h)
- R(g);P_PINR(I)::QAB1(G),XP(h)
- R(i);::QAB1(G),XP(h)
- R(i);N_GUARD::S(F),XR(i)
- Refutation
- S(a);
- Try
- R(K);
- Threat
- DUALS(2)
- Vars
- R(g);P_SPINR(g),XS(E)::QAB1(G),XP(h)
- R(i);P_SPINR(g),XR(K)::QAB1(G),XP(h)
- B(j);P_SPINB(j),XS(E)::QAB1(G),XP(h)
- B(k);XR(K)::S(F)
- Refutation
- S(a);
- Try
- Q(G);N_PINP(h)
- Threat
- QAR1(G)
- Refutation
- R(i);CHECK,P_SPINR(g)
- Try
- Q(G);N_PINP(h)
- Threat
- QAR1(G)
- Refutation
- R(i);CHECK,P_SPINR(g),XQ(G)
- Try
- P(D);XP(h)
- Threat
- DUALS(2)
- Vars
- B(k);OGATE,P_PINQ(G),P_SPINB(k),XP(D)::QAB1(G),XB(k)
- S(a);::QAR2(G)
- S(a);::QAB(G)
- Refutation
- R(i);P_SPINR(g),XQ(G)
- Try
- Actual
- R(I);XP(h)
- Threat
- QAB(G)+R(I),DCHECK
- Vars
- R(g);CHECK,P_SPINR(i),S_CUTB(k)::QAB(G)+R(I)
- R(i);CHECK,N_GUARD,P_SPINR(g),S_CUTB(j)::R(K)+S(E)
- B(k);OGATE,P_PINQ(G),P_SPINB(k),XR(I)::QAB1(G),XB(k)
- R(i);P_SPINR(g),S_CUTB(k)::QAB(G)+R(I)
- B(k);S_CUTR(i)::S(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).