MESON Chess Problem Database
Problem Display
PID: 140500 (1B4K1/5R1p/4k1p1/p2p4/r7/1nb5/2QRn1N1/3Brb2 w - - 0 1)
Ellerman, Arnoldo
Problemas, 1945
#2
7 + 11
SOLUTION
- SOUND
- Sets
- 1...Ba1
- 2.Qc6#
- 2.Qc8#
- 1...Bb2
- 2.Qc6#
- 2.Qc8#
- 1...Bxd2
- 2.Qc6#
- 2.Qc8#
- 1...Bb4
- 2.Qc8#
- 1...Bd4
- 2.Qc6#
- 2.Qc8#
- 1...Be5
- 2.Qc8#
- 1...Bf6
- 2.Qc8#
- 1...Bg7
- 2.Qc6#
- 2.Qc8#
- 1...Bh8
- 2.Qc6#
- 2.Qc8#
- 1...Sed4
- 2.Sf4#
- 1...Sf4
- 2.Bg4#
- 1...d4
- 2.Qe4#
- 1...g5
- 2.Qf5#
- 1...Ba1
- Tries
- 1.Sf4+?
- 1...Sxf4
- 2.Bg4#
- 1...Rxf4!
- 1...Sxf4
- 1.Qxb3?
- threat
- 2.Qxd5#
- 2.Qb6#
- 1...Bxg2
- 2.Qb6#
- 1...Bxd2
- 2.Qb6#
- 1...Bf6
- 2.Qxd5#
- 1...Rb4
- 2.Qxd5#
- 1...Rd4
- 2.Qb6#
- 1...Bb4
- 2.Qxd5#
- 2.Qe3#
- 2.Qh3#
- 1...Bd4
- 2.Qh3#
- 1...Be5
- 2.Qxd5#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Bg4#
- 2.Qb6#
- 1...Rc4!
- threat
- 1.Qxg6+?
- 1...Bf6
- 2.Qxf6#
- 1...hxg6!
- 1...Bf6
- 1.Qxc3?
- threat
- 2.Qe5#
- 2.Qf6#
- 2.Qc6#
- 2.Qc8#
- 1...d4
- 2.Qc6#
- 1...Rc4
- 2.Qe5#
- 2.Qf6#
- 1...Rd4
- 2.Qc6#
- 2.Qc8#
- 1...Re4
- 2.Qf6#
- 2.Qc6#
- 2.Qc8#
- 1...Rf4
- 2.Qe5#
- 2.Qc6#
- 2.Qc8#
- 1...Sec1
- 2.Qf6#
- 2.Qc6#
- 2.Qc8#
- 1...Sg1
- 2.Qf6#
- 2.Qc6#
- 2.Qc8#
- 1...Sg3
- 2.Qf6#
- 2.Qc6#
- 2.Qc8#
- 1...Sed4
- 2.Sf4#
- 2.Qc8#
- 1...Sf4
- 2.Bg4#
- 2.Qf6#
- 2.Qc6#
- 2.Qc8#
- 1...Sbd4
- 2.Qe3#
- 2.Qc8#
- 1...Sc5
- 2.Qe5#
- 2.Qf6#
- 1...Sxc3!
- threat
- 1.Sf4+?
- Keys
- 1.Qd3!
- threat
- 2.Qa6#
- 2.Qxd5#
- 1...Bxg2
- 2.Qa6#
- 1...Bxd2
- 2.Qa6#
- 1...Sxd2
- 2.Qa6#
- 1...d4
- 2.Qe4#
- 1...Rb4
- 2.Qxd5#
- 1...Rc4
- 2.Qxd5#
- 1...Rd4
- 2.Qa6#
- 1...Bb4
- 2.Qe3#
- 2.Qh3#
- 2.Qxd5#
- 1...Bd4
- 2.Qh3#
- 1...Be5
- 2.Qxd5#
- 1...Bf6
- 2.Qxd5#
- 1...Sec1
- 2.Qxd5#
- 1...Sg1
- 2.Qxd5#
- 1...Sg3
- 2.Qxd5#
- 1...Sed4
- 2.Sf4#
- 1...Sf4
- 2.Bg4#
- 1...Sbd4
- 2.Qe3#
- 1...Sc5
- 2.Qxd5#
- threat
- 1.Qd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 12
- REMOVED MATES = 2
- Sets
- B(e);OGATE::QAB(B)
- S(c);N_GUARD,S_CUTR(f)::S(D)
- S(c);OGATE::B(A)
- P(h);N_GUARD,S_CUTB(e),S_CUTR(f)::QAR2(B)
- P(j);N_GUARD::QAB1(B)
- Tries
- Try
- S(D);CHECK
- Vars
- S(c);OGATE,XS(D)::B(A)
- Refutation
- R(f);XS(D)
- Try
- Q(B);P_PINP(h),XS(d)
- Threat
- DUALS(2)
- Vars
- B(b);XS(D)::QAR(B)
- B(e);XR(C)::QAR(B)
- B(e);::QAB1(B),XP(h)
- R(f);::QAB1(B),XP(h)
- R(f);::QAR(B)
- B(e);OGATE::QAB(B)
- S(c);N_GUARD,S_CUTR(f)::S(D)
- Refutation
- R(f);N_SPINP(h)
- Try
- Q(B);CHECK,XP(j)
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAR1(B),XB(e)
- Refutation
- P(k);XQ(B)
- Try
- Q(B);XB(e)
- Threat
- DUALS(4)
- Vars
- P(h);::QAR2(B)
- Refutation
- S(c);XQ(B)
- Try
- Actual
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(b);XS(D)::QAR(B)
- B(e);XR(C)::QAR(B)
- S(d);XR(C)::QAR(B)
- P(h);N_GUARD,S_CUTB(e),S_CUTR(f)::QAR2(B)
- R(f);::QAB1(B),XP(h)
- R(f);::QAR(B)
- B(e);S_CUTR(f)::QAB(B)
- B(e);::QAB1(B),XP(h)
- S(c);::QAB1(B),XP(h)
- S(c);N_GUARD,S_CUTR(f)::S(D)
- S(c);OGATE::B(A)
- S(d);S_CUTB(e),S_CUTR(f)::QAR(B)
- S(d);::QAB1(B),XP(h)
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).