MESON Chess Problem Database

Problem Display
PID: 96541 (8/rbB5/qr1QN3/1k4K1/4R3/1nPN4/8/8 w - - 0 1)

Marcos, EM

Problemas, 1964

8/rbB5/qr1QN3/1k4K1/4R3/1nPN4/8/8

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qb4#
    • 1...Qa1
      • 2.Qxb6#
    • 1...Qa2
      • 2.Qxb6#
    • 1...Qa3
      • 2.Qxb6#
    • 1...Qa4
      • 2.Qxb6#
    • 1...Rc6
      • 2.Rb4#
      • 2.Qb4#
    • 1...Bc6
      • 2.Qb4#
    • 1...Sa1
      • 2.Qc5#
    • 1...Sc1
      • 2.Qc5#
    • 1...Sd2
      • 2.Qc5#
    • 1...Sa5
      • 2.Rb4#
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Qb4#
      • 1...Ka5
        • 2.Qb4#
      • 1...Rxd6
        • 2.Rb4#
      • 1...Qa1
        • 2.Qxb6#
      • 1...Qa2
        • 2.Qxb6#
      • 1...Qa3
        • 2.Qxb6#
      • 1...Qa4
        • 2.Qxb6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Qa5!
    • 1.Qd5+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Bxd5!
    • 1.Qd7+?
      • 1...Ka5
        • 2.Ra4#
        • 2.Qa4#
      • 1...Rc6
        • 2.Rb4#
      • 1...Bc6!
    • 1.c4+?
      • 1...Ka5
        • 2.Qa3#
        • 2.Qb4#
      • 1...Ka4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qb4#
      • 1...Ka5
        • 2.Qb4#
      • 1...Rxd6
        • 2.Rb4#
      • 1...Qa1
        • 2.Qxb6#
      • 1...Qa2
        • 2.Qxb6#
      • 1...Qa3
        • 2.Qxb6#
      • 1...Qa4
        • 2.Qxb6#
      • 1...Qa5
        • 2.Qd3#
      • 1...Sc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(b);P-FLIGHT,P_SPINR(d)::QAB1(E)
    • Q(c);N_GUARD::QAR1(E),XR(d)
    • B(f);SBLOCK::QAR1(E)
    • S(a);N_GUARD::QAR1(E)
    • S(a);N_GUARD::QAR1(E),XS(a)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(E)
      • Vars
        • K(b);P-FLIGHT,P_SPINR(d)::QAB1(E)
        • R(d);XQ(E)::R1(C)
        • Q(c);N_GUARD::QAR1(E),XR(d)
        • S(a);N_GUARD::QAR1(E),XS(a)
      • Refutation
        • Q(c);
    • Try
      • Q(E);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(E),XS(a)
      • Refutation
        • B(f);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • R(d);P_SPINR(d)::R1(C)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • P(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(E)
    • Vars
      • K(b);P-FLIGHT,P_SPINR(d)::QAB1(E)
      • R(d);XQ(E)::R1(C)
      • Q(c);N_GUARD::QAR1(E),XR(d)
      • Q(c);SBLOCK::QAB(E)
      • S(a);N_GUARD::QAR1(E),XS(a)
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