MESON Chess Problem Database

Problem Display
PID: 139227 (1qb5/Q6p/1PppP1P1/1ppk2pP/2N3R1/2P2KN1/3pR3/1B2b3 w - - 0 1)

Pavlov, Mikhail Aleksandrovich

Mat Plus, 1997

1qb5/Q6p/1PppP1P1/1ppk2pP/2N3R1/2P2KN1/3pR3/1B2b3

#2

12 + 11

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb6
      • 2.Sxb6#
    • 1...bxc4
      • 2.Rxg5#
  • Tries
    • 1.Be4+?
      • 1...Kxe6
        • 2.Qf7#
      • 1...Kxc4!
    • 1.Rxd2+?
      • 1...Kxe6
        • 2.Qf7#
      • 1...Bxd2!
    • 1.Qxb8?
      • threat
        • 2.Qxd6#
      • 1...bxc4
        • 2.Rxg5#
      • 1...Bxg3!
    • 1.Qa2?
      • threat
        • 2.Rxg5#
      • 1...Bxg3
        • 2.Qxd2#
      • 1...Bxe6
        • 2.Be4#
      • 1...h6!
    • 1.Qe7?
      • threat
        • 2.Qxg5#
      • 1...Bxg3
        • 2.Rxd2#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...h6!
    • 1.Qf7?
      • threat
        • 2.Qf5#
      • 1...Bxg3
        • 2.Rxd2#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...hxg6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf6#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Kxe6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(j);XP(I)::S(F),XQ(j)
    • P(c);SBLOCK,XS(F)::R(G),XP(f)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(e);S_FLIGHT,XP(J)::QAB1(L)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • R(B);CHECK,XP(b)
      • Vars
        • K(e);S_FLIGHT,XP(J)::QAB1(L)
      • Refutation
        • B(a);XR(B)
    • Try
      • Q(L);XQ(j)
      • Threat
        • QAR1(L),XP(h)
      • Vars
        • P(c);SBLOCK,XS(F)::R(G),XP(f)
      • Refutation
        • B(a);XS(E)
    • Try
      • Q(L);
      • Threat
        • R(G),XP(f)
      • Vars
        • B(a);N_GUARD,XS(E)::QAR(L),XP(b)
        • B(k);SBLOCK,XP(J)::B(A)
      • Refutation
        • P(i);
    • Try
      • Q(L);
      • Threat
        • QAR(L),XP(f)
      • Vars
        • B(a);N_GUARD,XS(E)::R(B),XP(b)
        • B(k);OGATE,XP(J)::QAB1(L),XB(k)
      • Refutation
        • P(i);
    • Try
      • Q(L);
      • Threat
        • QAR2(L)
      • Vars
        • B(a);N_GUARD,XS(E)::R(B),XP(b)
        • B(k);OGATE,P_SPINB(k),XP(J)::QAB1(L),XB(k)
      • Refutation
        • P(i);XP(K)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(F)::QAB(L)
      • K(e);OGATEB,S_FLIGHT,XP(J)::QAB1(L)
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