MESON Chess Problem Database
Problem Display
PID: 270938 (B7/8/1p1P4/nNk5/P5R1/1r2N2K/bP6/n5Q1 w - - 0 1)
Ellerman, Arnoldo
Die Schwalbe, 1931
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Rxb2
- 2.Sc2#
- 1...Ra3
- 2.b4#
- 1...Rc3
- 2.b4#
- 1...Rd3
- 2.b4#
- 1...Rxe3+
- 2.Qxe3#
- 1...Rb4
- 2.Sc4#
- 1...Rxb5
- 2.Sf5#
- 1...Sc4
- 2.Rxc4#
- 1...Sc6
- 2.Rc4#
- 1...Sb7
- 2.Rc4#
- 1...Rxb2
- Tries
- 1.Rf4?
- threat
- 2.Qg5#
- 1...Rxe3+
- 2.Qxe3#
- 1...Rxb2
- 2.Sc2#
- 1...Rxb5
- 2.Sf5#
- 1...Sc4
- 2.Rxc4#
- 1...Sb7
- 2.Rc4#
- 1...Ra3
- 2.b4#
- 1...Rc3
- 2.b4#
- 1...Rd3
- 2.b4#
- 1...Rb4
- 2.Sc4#
- 1...Sc6
- 2.Rc4#
- 1...Bb1!
- threat
- 1.Rh4?
- threat
- 2.Qg5#
- 1...Rxe3+
- 2.Qxe3#
- 1...Rxb2
- 2.Sc2#
- 1...Rxb5
- 2.Sf5#
- 1...Sc4
- 2.Rxc4#
- 1...Sb7
- 2.Rc4#
- 1...Ra3
- 2.b4#
- 1...Rc3
- 2.b4#
- 1...Rd3
- 2.b4#
- 1...Rb4
- 2.Sc4#
- 1...Sc6
- 2.Rc4#
- 1...Bb1!
- threat
- 1.Qf2?
- threat
- 2.Qf5#
- 1...Rxe3+
- 2.Qxe3#
- 1...Rxb2
- 2.Sc2#
- 1...Rxb5
- 2.Sf5#
- 1...Sc4
- 2.Rxc4#
- 1...Sb7
- 2.Rc4#
- 1...Ra3
- 2.b4#
- 1...Rc3
- 2.b4#
- 1...Rd3
- 2.b4#
- 1...Rb4
- 2.Sc4#
- 1...Sc6
- 2.Rc4#
- 1...Bb1!
- threat
- 1.Qc1+?
- 1...Rc3
- 2.b4#
- 1...Sc4
- 2.Rxc4#
- 2.Qxc4#
- 1...Sc2!
- 1...Rc3
- 1.Rf4?
- Keys
- 1.Re4!
- threat
- 2.Qg5#
- 1...Rxe3+
- 2.Qxe3#
- 1...Rxb2
- 2.Sc2#
- 1...Rxb5
- 2.Sf5#
- 1...Sc4
- 2.Rxc4#
- 1...Sb7
- 2.Rc4#
- 1...Ra3
- 2.b4#
- 1...Rc3
- 2.b4#
- 1...Rd3
- 2.b4#
- 1...Rb4
- 2.Sc4#
- 1...Sc6
- 2.Rc4#
- threat
- 1.Re4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(c);N_PINS(C),XP(B)::QAB(A)+S(C)
- R(c);OGATE::P(B)
- R(c);CHECK,OGATE,P_SPINR(c),XS(C)::QAB(A),XR(c)
- R(c);N_PINS(C),SBLOCK::QAB(A)+S(C)
- R(c);N_PINS(C),XS(G)::QAB(A)+S(C)
- S(d);N_GUARD::R1(F),XS(d)
- S(d);N_GUARD::R1(F)
- Tries
- Try
- R(F);
- Threat
- QAR(A)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(C)::QAB(A),XR(c)
- R(c);N_PINS(C),XP(B)::QAB(A)+S(C)
- R(c);N_PINS(C),XS(G)::QAB(A)+S(C)
- S(d);N_GUARD::R1(F),XS(d)
- S(d);N_GUARD::R1(F)
- R(c);OGATE::P(B)
- R(c);N_PINS(C),SBLOCK::QAB(A)+S(C)
- Refutation
- B(b);
- Try
- R(F);
- Threat
- QAR(A)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(C)::QAB(A),XR(c)
- R(c);N_PINS(C),XP(B)::QAB(A)+S(C)
- R(c);N_PINS(C),XS(G)::QAB(A)+S(C)
- S(d);N_GUARD::R1(F),XS(d)
- S(d);N_GUARD::R1(F)
- R(c);OGATE::P(B)
- R(c);N_PINS(C),SBLOCK::QAB(A)+S(C)
- Refutation
- B(b);
- Try
- Q(A);
- Threat
- QAR(A)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(C)::QAB(A),XR(c)
- R(c);N_PINS(C),XP(B)::QAB(A)+S(C)
- R(c);N_PINS(C),XS(G)::QAB(A)+S(C)
- S(d);N_GUARD::R1(F),XS(d)
- S(d);N_GUARD::R1(F)
- R(c);OGATE::P(B)
- R(c);N_PINS(C),SBLOCK::QAB(A)+S(C)
- Refutation
- B(b);
- Try
- Q(A);CHECK
- Vars
- R(c);OGATE,P_SPINR(c)::P(B)
- Refutation
- S(a);P_SPINS(a)
- Try
- Actual
- R(F);
- Threat
- QAR(A)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(C)::QAB(A),XR(c)
- R(c);N_PINS(C),XP(B)::QAB(A)+S(C)
- R(c);N_PINS(C),XS(G)::QAB(A)+S(C)
- S(d);N_GUARD::R1(F),XS(d)
- S(d);N_GUARD::R1(F)
- R(c);OGATE::P(B)
- R(c);N_PINS(C),SBLOCK::QAB(A)+S(C)
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).