MESON Chess Problem Database
Problem Display
PID: 175269 (k6K/1R6/8/4B3/4R3/qn3B2/Q7/r7 w - - 0 1)
Berlin, Dieter
Deutsche Schachzeitung, 1977
#2
6 + 4
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qa7
- 2.Rxa7#
- 2.Rb8#
- 1...Qa7
- Tries
- 1.Ra4+?
- 1...Qxa4
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Sa5!
- 1...Qxa4
- 1.Rc4?
- threat
- 2.Rc8#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Rh1+
- 2.Rh7#
- 1...Rc1
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Rd1
- 2.Rc8#
- 1...Re1
- 2.Rc8#
- 1...Rf1
- 2.Rc8#
- 1...Sd2
- 2.Rc8#
- 1...Sd4
- 2.Rc8#
- 1...Sa5
- 2.Rc8#
- 1...Sc5!
- threat
- 1.Ra7+?
- 1...Qxa7
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Kxa7!
- 1...Qxa7
- 1.Rd7?
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Red4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Rh1+
- 2.Rh4#
- 1...Rc1
- 2.Ra4#
- 2.Rc4#
- 1...Qa4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 2.Red4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Rd1
- 2.Ra4#
- 2.Red4#
- 1...Re1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 1...Rf1
- 2.Ra4#
- 1...Sd2
- 2.Ra4#
- 2.Qd5#
- 1...Sd4
- 2.Rexd4#
- 1...Sc5
- 2.Ra4#
- 2.Qg8#
- 1...Sa5!
- threat
- 1.Rf7?
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Ref4#
- 2.Rg4#
- 2.Rh4#
- 1...Rh1+
- 2.Rh4#
- 1...Rc1
- 2.Ra4#
- 2.Rc4#
- 1...Qa4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Ref4#
- 2.Rg4#
- 2.Rh4#
- 1...Rd1
- 2.Ra4#
- 2.Rd4#
- 1...Re1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 1...Rf1
- 2.Ra4#
- 1...Sd2
- 2.Ra4#
- 2.Qd5#
- 1...Sd4
- 2.Rxd4#
- 1...Sc5
- 2.Ra4#
- 1...Sa5!
- threat
- 1.Rg7?
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 1...Rh1+
- 2.Rh4#
- 1...Rc1
- 2.Ra4#
- 2.Rc4#
- 1...Qa4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 1...Rd1
- 2.Ra4#
- 2.Rd4#
- 1...Re1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 1...Rf1
- 2.Ra4#
- 1...Sd2
- 2.Ra4#
- 2.Qd5#
- 1...Sd4
- 2.Rxd4#
- 1...Sc5
- 2.Ra4#
- 2.Qg8#
- 1...Sa5!
- threat
- 1.Rh7?
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Reh4#
- 1...Rc1
- 2.Ra4#
- 2.Rc4#
- 1...Qa4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Reh4#
- 1...Rd1
- 2.Ra4#
- 2.Rd4#
- 1...Re1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 1...Rf1
- 2.Ra4#
- 1...Sd2
- 2.Ra4#
- 2.Qd5#
- 1...Sd4
- 2.Rxd4#
- 1...Sc5
- 2.Ra4#
- 2.Qg8#
- 1...Sa5!
- threat
- 1.Ra4+?
- Keys
- 1.Re7!
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Rh1+
- 2.Rh4#
- 1...Rc1
- 2.Ra4#
- 2.Rc4#
- 1...Qa4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Rd1
- 2.Ra4#
- 2.Rd4#
- 1...Re1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 1...Rf1
- 2.Ra4#
- 1...Sd2
- 2.Ra4#
- 2.Qd5#
- 2.Qg8#
- 1...Sd4
- 2.Rxd4#
- 2.Qg8#
- 1...Sa5
- 2.Qg8#
- 1...Sc5
- 2.Ra4#
- 2.Qg8#
- threat
- 1.Re7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Tries
- Try
- R(C);CHECK,N_PINQ(b)
- Refutation
- S(c);P_SPINS(c)
- Try
- R(C);
- Threat
- DUALS(6)
- Vars
- R(a);CHECK::B(B)+R(E)
- R(a);::R(C)
- S(c);::R(C)
- S(c);N_SPINQ(b)::R(C)
- Refutation
- S(c);
- Try
- R(E);CHECK,N_PINQ(b)
- Refutation
- K(d);P-FLIGHT,P_SPINQ(b),XR(E)
- Try
- R(E);
- Threat
- DUALS(10)
- Vars
- R(a);CHECK::B(B)+R(C)
- R(a);::B(B)+R(C),DCHECK
- S(c);::B(B)+R(C),XS(c)
- Refutation
- S(c);N_SPINQ(b)
- Try
- R(E);
- Threat
- DUALS(10)
- Vars
- R(a);CHECK::B(B)+R(C)
- R(a);::B(B)+R(C),DCHECK
- S(c);::B(B)+R(C),XS(c)
- S(c);::B(B)+R(C),DCHECK
- Refutation
- S(c);N_SPINQ(b)
- Try
- R(E);
- Threat
- DUALS(10)
- Vars
- R(a);CHECK::B(B)+R(C)
- R(a);::B(B)+R(C),DCHECK
- S(c);::B(B)+R(C),XS(c)
- Refutation
- S(c);N_SPINQ(b)
- Try
- R(E);
- Threat
- DUALS(10)
- Vars
- R(a);::B(B)+R(C),DCHECK
- S(c);::B(B)+R(C),XS(c)
- Refutation
- S(c);N_SPINQ(b)
- Try
- Actual
- R(E);
- Threat
- DUALS(10)
- Vars
- R(a);CHECK::B(B)+R(C)
- R(a);::B(B)+R(C),DCHECK
- S(c);N_SPINQ(b),OGATE::QAR(A)
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