MESON Chess Problem Database
Problem Display
PID: 207908 (8/2KBpr1n/8/Q1N1k2N/6P1/3R1P2/8/2r5 w - - 0 1)
Ellerman, Arnoldo
Il Problema, 1932
#2
8 + 5
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sa4#
- 2.Qc3#
- 2.Qxa1#
- 1...Rb1
- 2.Sb3#
- 2.Qc3#
- 1...Rd1
- 2.Sb3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qc3#
- 1...Re1
- 2.Sb3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qxe1#
- 2.Qc3#
- 1...Rf1
- 2.Sb3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qc3#
- 1...Rg1
- 2.Sb3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qc3#
- 1...Rh1
- 2.Sb3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qc3#
- 1...Rc3
- 2.Qxc3#
- 1...Rxc5+
- 2.Qxc5#
- 1...Rg7
- 2.f4#
- 1...Sf6
- 2.f4#
- 1...Ra1
- Tries
- 1.Kc6?
- threat
- 2.Rd5#
- 2.Qc7#
- 1...Rxc5+
- 2.Qxc5#
- 1...Rd1
- 2.Sb3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qc3#
- 2.Qc7#
- 1...Sf6
- 2.Qc7#
- 2.f4#
- 1...e6
- 2.Qc7#
- 1...Rf6+!
- threat
- 1.Kb7?
- threat
- 2.Qc7#
- 1...Rb1+
- 2.Sb3#
- 1...Rxc5
- 2.Qe1#
- 2.Qxc5#
- 1...Rf6!
- threat
- 1.Be6?
- threat
- 2.Rd5#
- 1...Rd1
- 2.Qc3#
- 1...Sf6
- 2.f4#
- 1...Rxc5+!
- threat
- 1.Qd2?
- threat
- 2.Re3#
- 2.Rd5#
- 2.Qe3#
- 2.Qe2#
- 1...Rxf3
- 2.Rd5#
- 1...Re1
- 2.Rd5#
- 2.Qxe1#
- 2.Qc3#
- 2.Qb2#
- 1...Rc2
- 2.Re3#
- 2.Rd5#
- 2.Qe3#
- 1...Rc3
- 2.Rd5#
- 2.Qe1#
- 2.Qxc3#
- 2.Qe3#
- 2.Qe2#
- 1...Rc4
- 2.Rd5#
- 1...Rf4
- 2.Rd5#
- 2.Qxf4#
- 1...Sg5
- 2.Rd5#
- 1...Sf6
- 2.Qf4#
- 2.Qg5#
- 2.Qh2#
- 2.f4#
- 1...e6
- 2.Re3#
- 2.Qe3#
- 2.Qe2#
- 1...Rxc5+!
- threat
- 1.Qb4?
- threat
- 2.Qd4#
- 2.Qe4#
- 1...Rxc5+
- 2.Qxc5#
- 1...Re1
- 2.Qxe1#
- 2.Qc3#
- 2.Qb2#
- 2.Qd4#
- 1...Rf4
- 2.Qxf4#
- 1...Sg5
- 2.Qd4#
- 1...Sf6
- 2.Qd4#
- 2.Qf4#
- 2.f4#
- 1...Rc4!
- threat
- 1.Qa1+?
- 1...Rc3
- 2.Qxc3#
- 2.Qe1#
- 1...Rxa1!
- 1...Rc3
- 1.Qa8?
- threat
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 1...Rd1
- 2.Qe4#
- 2.Qd5#
- 1...Re1
- 2.Rd5#
- 2.Qd5#
- 1...Rc4
- 2.Rd5#
- 2.Qd5#
- 1...Rf4
- 2.Rd5#
- 2.Qd5#
- 1...Sg5
- 2.Rd5#
- 2.Qd5#
- 1...Sf6
- 2.f4#
- 1...e6
- 2.Qe4#
- 1...Rxc5+!
- threat
- 1.Kc6?
- Keys
- 1.Bc6!
- threat
- 2.Rd5#
- 1...e6+
- 2.Sd7#
- 1...Rxc5
- 2.Qe1#
- 1...Rd1
- 2.Qc3#
- 1...Sf6
- 2.f4#
- threat
- 1.Bc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(a);N_GUARD::QAB(D),XR(a)
- R(a);CHECK,OGATE,P_SPINR(a),XS(E)::QAR2(D),XR(a)
- R(d);N_GUARD::P(B)
- S(e);S_CUTR(d)::P(B)
- Tries
- Try
- K(G);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XS(E)::QAR2(D),XR(a)
- P(c);::QAB(D)
- Refutation
- R(d);CHECK
- Try
- K(G);N_SPINS(E),P-FLIGHT
- Threat
- QAB(D)
- Vars
- R(a);CHECK,N_GUARD::QAR(D)+S(E)
- Refutation
- R(d);
- Try
- B(H);
- Threat
- R1(A)
- Vars
- R(a);N_GUARD,N_PINS(E)::QAB(D)
- S(e);S_CUTR(d)::P(B)
- Refutation
- R(a);CHECK,P_SPINR(a),XS(E)
- Try
- Q(D);
- Threat
- DUALS(4)
- Vars
- R(d);XP(B)::R1(A)
- R(a);::R1(A)
- S(e);::R1(A)
- Refutation
- R(a);CHECK,XS(E)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,OGATE,XS(E)::QAR2(D),XR(a)
- R(d);N_GUARD::QAB1(D),XR(d)
- S(e);::QAB1(D)
- Refutation
- R(a);
- Try
- Q(D);CHECK
- Refutation
- R(a);N_PINS(E),XQ(D)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- S(e);S_CUTR(d)::P(B)
- P(c);P_PINB(H)::QAR1(D)
- Refutation
- R(a);CHECK,XS(E)
- Try
- Actual
- B(H);N_SPINS(E)
- Threat
- R1(A)
- Vars
- P(c);CHECK,SBLOCK::QAR(D)+S(E),DCHECK
- R(a);N_GUARD,P_PINB(H),P_SPINR(a),XS(E)::QAR(D)
- R(a);N_GUARD::QAB(D)
- S(e);S_CUTR(d)::P(B)
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).