MESON Chess Problem Database

Problem Display
PID: 268367 (B1r2q2/p2Np3/KB4pN/6pp/4pkp1/bQR4n/6R1/4r3 w - - 0 1)

Maslov, Boris Grigorevich

Shakhmatnaya kompozitsiya, 1996

B1r2q2/p2Np3/KB4pN/6pp/4pkp1/bQR4n/6R1/4r3

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh6
      • 2.Qf7#
    • 1...Qf7
      • 2.Qxf7#
    • 1...Qd8
      • 2.Qf7#
    • 1...Sf2
      • 2.Rxf2#
    • 1...h4
      • 2.Rxg4#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Qg3#
      • 1...Re3
        • 2.Qxe3#
      • 1...g3
        • 2.Qxg3#
      • 1...h4
        • 2.Rxg4#
      • 1...Qxh6!
    • 1.Rc5?
      • threat
        • 2.Qg3#
      • 1...e3
        • 2.Qc4#
      • 1...g3
        • 2.Qxg3#
      • 1...h4
        • 2.Rxg4#
      • 1...Re3!
    • 1.Rc6?
      • threat
        • 2.Qg3#
      • 1...Qxh6
        • 2.Qf7#
      • 1...Re3
        • 2.Qxe3#
      • 1...g3
        • 2.Qxg3#
      • 1...h4
        • 2.Rxg4#
      • 1...e3!
    • 1.Rxc8?
      • threat
        • 2.Rxf8#
        • 2.Qg3#
      • 1...Qxh6
        • 2.Qf7#
      • 1...Re3
        • 2.Rxf8#
        • 2.Qxe3#
      • 1...e3
        • 2.Rc4#
        • 2.Rxf8#
        • 2.Qc4#
      • 1...Qg7
        • 2.Qg3#
      • 1...Qf5
        • 2.Qg3#
      • 1...Qf6
        • 2.Qg3#
      • 1...Qf7
        • 2.Qxf7#
        • 2.Qg3#
      • 1...Qd8
        • 2.Qf7#
        • 2.Qg3#
      • 1...Qe8
        • 2.Qg3#
      • 1...Qg8
        • 2.Qg3#
      • 1...Qh8
        • 2.Qg3#
      • 1...Bb2
        • 2.Qg3#
      • 1...g3
        • 2.Rxf8#
        • 2.Qxg3#
      • 1...h4
        • 2.Rxg4#
        • 2.Rxf8#
      • 1...e5
        • 2.Qg3#
      • 1...e6
        • 2.Qg3#
      • 1...Qxc8+!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Qg3#
      • 1...Qxh6
        • 2.Qf7#
      • 1...Re3
        • 2.Qxe3#
      • 1...e3
        • 2.Qc4#
      • 1...g3
        • 2.Qxg3#
      • 1...h4
        • 2.Rxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(m);N_GUARD,XS(F)::QAR(B)
    • Q(m);N_GUARD::QAR(B),XQ(m)
    • Q(m);N_GUARD::QAR(B)
    • S(c);N_GUARD::R(A),XS(c)
    • P(h);N_GUARD::R1(A),XP(f)
  • Tries
    • Try
      • R(C);P_PINP(d)
      • Threat
        • QAB1(B)
      • Vars
        • R(a);N_GUARD::QAB1(B),XR(a)
        • P(f);::QAB1(B),XP(f)
        • P(h);N_GUARD::R1(A),XP(f)
      • Refutation
        • Q(m);XS(F)
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • P(d);OGATEB,SBLOCK::QAR(B)
        • P(f);::QAB1(B),XP(f)
        • P(h);N_GUARD::R1(A),XP(f)
      • Refutation
        • R(a);
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • Q(m);N_GUARD,XS(F)::QAR(B)
        • R(a);N_GUARD::QAB1(B),XR(a)
        • P(f);::QAB1(B),XP(f)
        • P(h);N_GUARD::R1(A),XP(f)
      • Refutation
        • P(d);
    • Try
      • R(C);XR(l)
      • Threat
        • DUALS(2)
      • Vars
        • Q(m);N_GUARD,XS(F)::QAR(B)
        • Q(m);::QAB1(B)
        • Q(m);P_PINB(E)::QAB1(B)
        • B(b);::QAB1(B)
        • P(k);::QAB1(B)
      • Refutation
        • Q(m);CHECK,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAB1(B)
    • Vars
      • Q(m);N_GUARD,XS(F)::QAR(B)
      • R(a);N_GUARD::QAB1(B),XR(a)
      • P(d);OGATEB::QAR(B)
      • P(f);::QAB1(B),XP(f)
      • P(h);N_GUARD::R1(A),XP(f)
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