MESON Chess Problem Database
Problem Display
PID: 102103 (8/2RBBp2/1K1PP3/1N1k4/4r1N1/1n3r2/4R3/7Q w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1938
#2
10 + 5
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rf1
- 2.Qxe4#
- 1...Rf2
- 2.Qxe4#
- 1...Rc3
- 2.Qxe4#
- 1...Rd3
- 2.Qxe4#
- 1...Rg3
- 2.Qxe4#
- 1...Rh3
- 2.Qxe4#
- 1...Rf5
- 2.Qxe4#
- 1...Rf6
- 2.Qxe4#
- 1...Ra4
- 2.Sf6#
- 2.Re5#
- 1...Rb4
- 2.Sf6#
- 2.Re5#
- 1...Rc4
- 2.Sf6#
- 2.Re5#
- 1...Rd4
- 2.Sf6#
- 2.Sc3#
- 2.Re5#
- 1...Rf4
- 2.Re5#
- 1...Re5
- 2.Sf6#
- 2.Rxe5#
- 1...Sa1
- 2.Rc5#
- 1...Sc1
- 2.Rc5#
- 1...Sd2
- 2.Rc5#
- 1...Sd4
- 2.Rc5#
- 1...Sa5
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Rf1
- Tries
- 1.Sf6+?
- 1...Rxf6
- 2.Qxe4#
- 1...Ke5!
- 1...Rxf6
- 1.Sc3+?
- 1...Rxc3
- 2.Qxe4#
- 1...Kd4!
- 1...Rxc3
- 1.Rd2+?
- 1...Rd4
- 2.Sc3#
- 2.Qxf3#
- 1...Sxd2
- 2.Rc5#
- 1...Sd4
- 2.Rc5#
- 1...Rd3!
- 1...Rd4
- 1.Rxe4?
- threat
- 2.Bc6#
- 2.Re5#
- 1...Rc3
- 2.Sf6#
- 2.Sxc3#
- 2.Re3#
- 2.Rd4#
- 2.Re5#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Sa5
- 2.Rd4#
- 2.Re5#
- 1...Sc5
- 2.Bc6#
- 2.Rd4#
- 1...f6
- 2.Bc6#
- 1...Kxe4!
- threat
- 1.Qxf3?
- threat
- 2.Qxe4#
- 1...Sc5
- 2.Rxc5#
- 1...Sd2
- 2.Rxd2#
- 2.Rc5#
- 1...f5!
- threat
- 1.Qa1?
- threat
- 2.Qa8#
- 1...Sxa1
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Ra4
- 2.Re5#
- 2.Qe5#
- 1...Rc4
- 2.Re5#
- 2.Qe5#
- 1...Sd4
- 2.Rc5#
- 1...Sa5
- 2.Rc5#
- 1...Rc3!
- threat
- 1.Qc1?
- threat
- 2.Qc6#
- 1...Sxc1
- 2.Rc5#
- 1...Rc4
- 2.Re5#
- 2.Qxc4#
- 1...Sd4
- 2.Rc5#
- 2.Qc4#
- 2.Qc5#
- 1...Sa5
- 2.Rc5#
- 2.Qc5#
- 1...Sc5
- 2.Rxc5#
- 2.Qxc5#
- 1...Rc3!
- threat
- 1.Qd1+?
- 1...Rd4
- 2.Re5#
- 1...Sd2
- 2.Rc5#
- 1...Sd4
- 2.Rc5#
- 1...Rd3!
- 1...Rd4
- 1.Sf6+?
- Keys
- 1.Qh8!
- threat
- 2.Qa8#
- 1...Sc5
- 2.Rxc5#
- 1...Rc3
- 2.Sxc3#
- 1...Ra4
- 2.Re5#
- 2.Qe5#
- 1...Rc4
- 2.Re5#
- 2.Qe5#
- 1...Sd4
- 2.Rc5#
- 1...Sa5
- 2.Rc5#
- threat
- 1.Qh8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 11
- Sets
- R(b);OGATE,P_SPINR(c)::QAB1(A),XR(c)
- R(c);OGATE,P_SPINR(b)::R1(B)
- S(a);N_GUARD::R1(H)
- S(a);N_GUARD::R1(H),XS(a)
- Tries
- Try
- S(C);CHECK
- Vars
- R(b);OGATE,P_SPINR(c),XS(C)::QAB1(A),XR(c)
- Refutation
- K(d);P-FLIGHT,P_SPINR(c)
- Try
- S(D);CHECK
- Vars
- R(b);OGATE,P_SPINR(c),XS(D)::QAB1(A),XR(c)
- Refutation
- K(d);P-FLIGHT
- Try
- R(B);CHECK
- Vars
- S(a);XR(B)::R1(H)
- S(a);P_SPINS(a)::R1(H)
- Refutation
- R(b);P_SPINR(b)
- Try
- R(B);XR(c)
- Threat
- DUALS(2)
- Vars
- P(e);::B(I)
- Refutation
- K(d);P_SPINR(b),S_FLIGHT,XR(B)
- Try
- Q(A);P_PINR(c),XR(b)
- Threat
- QAB1(A),XR(c)
- Vars
- S(a);N_GUARD::R1(H),XS(a)
- Refutation
- P(e);
- Try
- Q(A);
- Threat
- QAB(A)
- Vars
- S(a);N_GUARD,XQ(A)::R1(H)
- S(a);N_GUARD::R1(H),XS(a)
- S(a);N_GUARD::R1(H)
- Refutation
- R(b);
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- S(a);N_GUARD,XQ(A)::R1(H)
- Refutation
- R(b);
- Try
- Q(A);CHECK
- Vars
- R(c);OGATE,P_SPINR(c)::R1(B)
- S(a);P_SPINS(a)::R1(H)
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- Q(A);
- Threat
- QAB(A)
- Vars
- S(a);N_GUARD::R1(H),XS(a)
- R(b);N_GUARD::S(D),XR(b)
- S(a);N_GUARD::R1(H)
Developed and maintained by Brian Stephenson.
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