MESON Chess Problem Database
Problem Display
PID: 140774 (1B6/2NK4/2pR3N/1P2k1P1/4p1R1/Q3np1b/B1rr4/8 w - - 0 1)
Ellerman, Arnoldo
L'Echiquier, 1931
#2
10 + 8
SOLUTION
- SOUND
- Sets
- 1...Rxd6+
- 2.Qxd6#
- 1...Sf5
- 2.Sf7#
- 1...Rxd6+
- Tries
- 1.Se6?
- threat
- 2.Rxd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 1...Rxd6+
- 2.Bxd6#
- 2.Qxd6#
- 1...Rxa2
- 2.Rxd2#
- 2.Rd3#
- 2.Rd4#
- 1...cxb5
- 2.Rd5#
- 1...Rc4
- 2.Rxd2#
- 2.Rd3#
- 2.Rd4#
- 1...Rd1
- 2.Rxd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 1...Re2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 1...Rf2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 1...Rg2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 1...Rh2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 1...Rd3
- 2.Rxd3#
- 2.Rd4#
- 2.Rd5#
- 1...Rd4
- 2.Rxd4#
- 2.Rd5#
- 1...Rd5
- 2.Rxd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sf5
- 2.Sf7#
- 2.Rd5#
- 1...Sc4!
- threat
- 1.Rxd2?
- threat
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 2.Qd6#
- 2.Qe7#
- 1...Bxg4+
- 2.Se6#
- 1...Sxg4
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 2.Qd6#
- 1...cxb5
- 2.Qd6#
- 2.Qe7#
- 1...Sc4
- 2.Qc5#
- 2.Qe7#
- 1...Rc5
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 1...Sd5
- 2.Sxd5#
- 2.Qd6#
- 1...Sf5
- 2.Sf7#
- 1...c5
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 1...Rxd2+!
- threat
- 1.Rd3?
- threat
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 2.Qd6#
- 2.Qe7#
- 1...Bxg4+
- 2.Se6#
- 1...Sxg4
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 2.Qd6#
- 1...cxb5
- 2.Qd6#
- 2.Qe7#
- 1...Sc4
- 2.Qc5#
- 2.Qe7#
- 1...Rc5
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 1...Sd5
- 2.Sxd5#
- 2.Qd6#
- 1...Sf5
- 2.Sf7#
- 1...c5
- 2.Sd5#
- 2.Sa6#
- 2.Se6#
- 2.Sa8#
- 2.Se8#
- 1...Rxd3+!
- threat
- 1.Qc3+?
- 1...Rd4
- 2.Qxd4#
- 1...Rxc3!
- 1...Rd4
- 1.Se6?
- Keys
- 1.Rd4!
- threat
- 2.Se6#
- 2.Qd6#
- 1...Rxd4+
- 2.Sd5#
- 1...Bxg4+
- 2.Se6#
- 1...Kxd4
- 2.Se6#
- 1...cxb5
- 2.Qd6#
- 1...Sc4
- 2.Qc5#
- 1...Rc5
- 2.Se6#
- 1...Sd5
- 2.Rxe4#
- 1...Sf5
- 2.Rxe4#
- 1...c5
- 2.Se6#
- threat
- 1.Rd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 1
- Sets
- R(b);CHECK,OGATE,XR(F)::QAB1(B),XR(b)
- S(c);N_PINR(C),P_PINR(F),SBLOCK::S(G)
- Tries
- Try
- S(H);N_SPINR(C),P_SPINR(F)
- Threat
- DUALS(4)
- Vars
- P(h);XP(D)::B(J)+R(F),DCHECK
- R(b);::B(J)+R(F),DCHECK,XR(b)
- S(c);N_PINR(F)::B(J)+R(F),DCHECK,XS(c)
- Refutation
- S(c);
- Try
- R(F);XR(b)
- Threat
- DUALS(7)
- Vars
- B(e);CHECK,XR(C)::B(J)+S(H)
- S(c);N_PINR(C),SBLOCK::S(G)
- Refutation
- R(a);CHECK,XR(F)
- Try
- R(F);N_SPINR(C),P_SPINR(F)
- Threat
- DUALS(7)
- Vars
- B(e);CHECK,XR(C)::B(J)+S(H)
- S(c);SBLOCK::S(G)
- Refutation
- R(b);CHECK,P_PINR(C),XR(F)
- Try
- Q(B);CHECK
- Vars
- R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
- Refutation
- R(a);XQ(B)
- Try
- Actual
- R(F);N_SPINR(C),P_SPINR(F)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,P_PINR(C),SBLOCK,XR(F)::B(J)+S(H)
- B(e);CHECK,XR(C)::B(J)+S(H)
- K(g);P_PINR(C),P_SPINP(f),S_FLIGHT,XR(F)::S(H)
- P(h);XP(D)::QAB1(B)
- S(c);N_GUARD,S_CUTR(a)::QAR2(B)
- R(a);::B(J)+S(H)
- S(c);N_PINR(F),P_PINR(C)::R1(F),XP(f)
- S(c);OGATE::R1(C),XP(f)
- P(h);::B(J)+S(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).